Question

The radius of a wheel is 18 inches. What is the number of feet covered by this wheel in 20 revolutions?
a. 360$\pi$
b. 360
c. 720$\pi$
d. 720
e. 60$\pi$

Answer 1

distance cover by the wheel in one revolution = 2 * π * 18 = 36π

so the distance covered in 20 revolution = 36π * 20 = 720π