Q&A for How to Calculate Speed

Return to Full Article

Coming soon

Add New Question

Question

A car travels 100 km in 2 hours. What is the speed of the car?

Community Answer

Speed equals distance divided by time: 100 km / 2 hours. 100 / 2 = 50 km per hour.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 0 Helpful 0
Question

A car travels a distance of 270km in 41/2 hours. Find its speed?

Donagan

Top Answerer

Divide 270 km by 4½ to get 60 kilometers per hour.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 0 Helpful 0
Question

If I threw a ball and it took 0.53 seconds to travel 3 metres, how fast is it going in metres per second?

Donagan

Top Answerer

Divide 3 meters by 0.53 to get 5.66 meters per second.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 0 Helpful 0
Question

A car travelled from 100km in 8 hours and the time taken is 40km in 2 hours. How much the average speed of the whole journey?

Donagan

Top Answerer

Let's assume the car travels 100 km in 8 hours and then travels an additional 40 km in 2 hours. The total distance travelled is 140 km, and the total time travelled is 10 hours. The average speed is 140 / 10 = 14 kilometers per hour.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 0 Helpful 0
Question

Jane can run at a speed of 20 km/h. How long would it take her to reach the finish line if the racing track measures 15km?

Donagan

Top Answerer

Let's assume she runs 15 km. Let x be the time it takes her to run that distance. Set up this proportion: 20 km / 1 hr = 15 km / x hr. Cross-multiply: 20x = (1)(15). So x = 15/20 = 3/4 hr, or 45 minutes.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 0 Helpful 0
Question

A train leaves Lagos at 2040 hours, reaches Abeokuta at 2400hours and stops there for 30 minutes. Then it starts and reaches Zaria at 0600 hours. If Zaria is 1325 km far from Lagos, find the average speed?

Donagan

Top Answerer

The total distance traveled is 1325 km. The first leg of the trip lasts from 8:40 p.m. to midnight, or 3 hours and 20 minutes, or 200 minutes. The second leg of the trip lasts from 12:30 a.m. to 6:00 a.m., or 5 hours and 30 minutes, or 330 minutes. So the total travel time (not counting the layover) is (200 + 330) = 530 minutes. Divide 530 by 60 to get 8.83 hours. Then the average speed is 1325 km / 8.83 hours. Divide both numbers in that fraction by 8.83 to get 150.06 kilometers per hour (basically an average speed of 150 km/hr).

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 0 Helpful 0
Question

A car travels 15km in 2 hours. What is the speed of the car?

Donagan

Top Answerer

15 km in 2 hours is the same as 7½ km in one hour. The speed is 7.5 km/hr.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 1 Helpful 2
Question

How many miles per hour if an object moves 6 seconds in .0136 miles?

Donagan

Top Answerer

If you multiply 6 seconds by 600, you get 3600 seconds, or 1 hour. So multiply 0.0136 mile by 600 to get 8.16 miles per hour.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 1 Helpful 2
Question

What's your speed if you travel 4.3 km in 1.5 seconds?

Community Answer

If you want to express the speed in kilometers per second, simply divide 4.3 km by 1.5 seconds. That's 2.86 kilometers per second.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 0 Helpful 2
Question

If someone hits a tennis ball 40 meters in 1.234 seconds, what is the speed?

Donagan

Top Answerer

Divide 40 m by 1.234 to get 32.41 meters per second.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 0 Helpful 0
Question

The distance covered by a bike is given by the expression x² - 9 the time taken by the by to cover this distance is given by the expression x -3 second. What is the speed of the bike ?

Community Answer

Let's assume the distance is being measured in feet. Speed equals distance divided by time. In this case, the speed equals (x² - 9) / (x - 3) = [(x - 3)(x + 3)] / (x - 3) = (x + 3) feet per second.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 0 Helpful 0
Question

Which is faster: 1.042 m/s or 0.625 m/s?

I_l1ke_gam3s

Community Answer

1.042 meters per second is faster because it has way more speed than the other. The larger the value of m/s, the faster its speed.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 1 Helpful 1
Question

A car travels 1.2 miles in 1 minute and 36 seconds. How fast is the car moving?

Community Answer

1 minute and 36 seconds is 96 seconds. Divide 1.2 miles by 96 seconds: that's 0.0125 mile per second. Multiply that by 3600 to get miles per hour.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 1 Helpful 1
Question

What is the speed per hour if a cyclist pedals downhill for 1 km in 90 seconds?

Community Answer

Speed is calculated as distance divided by time. In this case it's 1 km / 90 seconds = 1 km / (1/40) hour. This equals 40 kilometers per hour.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 0 Helpful 0
Question

How long did a car journey of 500 km take if the car traveled at a constant speed of 80 km/h?

Community Answer

500 km / (80 km/hr) = 6.25 hours = 6 hours 15 minutes.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 0 Helpful 0
Question

What is the speed of a 32.5 kg crate initially at rest after being acted on by a net horizontal force of 145 N for 10 seconds?

BrandonThePika

Community Answer

To find the speed of the crate after 10 seconds, use the formula v = u + at, where u is the initial velocity (0 m/s), a is the acceleration (F/m = 145 N/32.5 kg = 4.4615 m/s²), and t is time. Substitute the values to get v = 0 + (4.4615 × 10) = 44.615 m/s. Thus, the speed is 44.615 m/s.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 0 Helpful 0
Question

How much fuel does a space launch vehicle consume in kilograms if it burns 1,000 kg of fuel per second for 3 minutes?

Evie

Community Answer

Multiply 1,000 kg/second by the total time in seconds (3 minutes x 60 seconds/minute). This results in a total fuel consumption of 180,000 kg.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 0 Helpful 0
Question

What distance does a train cover in 3 seconds if it travels 20 feet in 1/5 of a second at a constant speed?

GePM_S_D

Community Answer

The train travels at a speed of 20 feet per 0.2 seconds, which is 4 feet per second. Therefore, in 3 seconds, the train will cover a distance of 4 feet/second * 3 seconds = 12 feet.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 0 Helpful 0
Question

How can I calculate the top speed of a car?

Startrekker

Community Answer

The top speed of the car depends upon how much work the engine can do in one second and the friction coefficient between the tyre and the road.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 0 Helpful 0
Question

What does the gradient of a graph mean and how do I calculate the gradient?

Donagan

Top Answerer

"Gradient" means "slope." In the case of a straight-line graph, the gradient is calculated by dividing the amount of vertical change by the amount of horizontal change over a given length of the line.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 3 Helpful 11
Question

If a airship travels 141km in 33 seconds, how fast is it going?

Donagan

Top Answerer

It's traveling at the speed of 15,381.8 km/hr. To calculate that, divide 33 seconds into 3600 seconds (one hour), and then multiply that quotient by 141 km to get km/hr.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 4 Helpful 7
Question

A car traveled from 100km in 8 hrs and time taking is 40km in 2hrs, find the average speed of the whole journey?

Donagan

Top Answerer

The average speed is (100 + 40) km / (8 + 2) hrs = 140 / 10 = 14 km/hr.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 1 Helpful 4
Question

How fast is man running if he runs 72 ft in6 seconds in miles /hr?

Donagan

Top Answerer

During those six seconds, he is running at the rate of 8.18 miles per hour.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 0 Helpful 2
Question

If a man runs 1.6km in 6.5 minutes (6 minutes 30 seconds), at what speed is he running?

Donagan

Top Answerer

That's the equivalent of 14.77 km/hr.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 0 Helpful 2
Question

if a mousetrap car travels 8.23 meters in 3 seconds what is it's speed?

Hann B

Community Answer

Speed= Distance travelled/ time, so the speed of the car is 8.23/3=2.743m/s.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 0 Helpful 2
Question

If Usain Bolt runs 100 m in 9.58 seconds, what speed is he going?

Hann B

Community Answer

Speed=Distance travelled/ time so Usain Bolt's speed is 100/9.58=10.438m/s. To convert this to km/hr: (10.438x3600)/1000=37.6km/hr.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 0 Helpful 2
Question

A stone is dropped from the top of a cliff which is 80m high. How long does it take to reach the bottom of the cliff?

Community Answer

u=0 displacement (x)=-80m (don't worry!: -ve means its downwards) a=g=-10m/s^2 t=? x = ut + (1/2)a.t^2 -80m = (1/2)(-10)(t^2) m/s^2 (160/10)(s^2) = t^2 t= 4s (since time here can't be -ve) The stone will take 4 seconds to reach the ground (or 4.04 seconds if you take g=9.8 m/s^2).

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 0 Helpful 0
Question

If a man runs 5 km in 30 minutes, at what speed is he running?

Donagan

Top Answerer

He is running at a speed of 1/6 km per minute or approximately 10 km per hour.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 3 Helpful 21
Question

What if a train starts moving though 1km in 100s with uniform acceleration, so what will be the speed after 100s?

Startrekker

Community Answer

u = 0, t = 100s , displacement = 1 km = 1000m , v= ? s = ut + (0.5)a (t^2) 2000/10000 = a = 2/10 = 0.2 v= u + at = 0 + (0.2)(100) = 20 m/s.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 0 Helpful 0
Question

If it takes you 4.5 hours to drive from your home to your favorite weekend getaway, which is 315 miles away, then what is your average speed?

Community Answer

Speed is distance travelled divided by time, i.e. mile per hours. In this case, the answer is 315 miles/4.5 hours = 70 miles per hour.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 0 Helpful 0