wikiHow Calculating Linear Feet Practice Answers 1. 5 linear feet 2. 20 linear feet 3. 12 linear feet 4. 70 linear feet 5. 50 linear feet 6. 600 linear feet 7. 100 linear feet 8. 40 linear feet 9. 8 linear feet 10. Approximately 3.93 linear feet (based on the circumference of the pipe) 11. 50 linear feet 12. Approximately 3.14 x 100 linear feet (based on the circumference of the cable) 13. 80 linear feet 14. 10 linear feet 15. 20 linear feet 16. 8 linear feet 17. 18 linear feet 18. 500 linear feet 19. 8 linear feet 20. 100 linear feet Note: Some answers are given as approximations because they are based on the circumference of circular objects. Page