Question

A bus has wheels of diameter 0.7 m. How many times must a wheel of the bus rotate for covering the distance of 22 km between two towns?

Answer 1

Diameter of the wheels = 0.7 m
Circumference = π × d = 2.2 m
Total distance to be covered = 22 km
Number of rotations required = $\frac{\mathrm{Total}\mathrm{distance}\mathrm{to}\mathrm{be}\mathrm{covered}}{\left(\mathrm{Circumference}\mathrm{of}\mathrm{the}\mathrm{wheel}\right)}$
Number of rotations = $\frac{22000\mathrm{m}}{2.2\mathrm{m}}$ = 10,000
∴ Number of rotations required for covering the distance = 10,000