Maharashtra State BoardSSC (English Medium) 7th Standard
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The radius of the wheel of a bus is 0.7 m. How many rotations will a wheel complete while travelling a distance of 22 km? - Mathematics

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Sum

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?

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Solution

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.

Concept: Circumference of a Circle
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