Question

The radius of the wheel of a bus is 0.7 m. How many rotations will a wheel complete while traveling a distance of 22 km?

Answer 1

Circumference of circle = πd = `22/7` × 1.4 = 4.4 m

When the wheel completes one rotation it crosses a distance of 4.4 m., (1 rotation = 1 circumference)

Total number of rotations = `"distance"/"circumference"`

= `(22000)/(4.4)`

= `(220000)/(44)`

= 5000

A wheel completes 10,000 rotations to cover a distance of 22 km.