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प्रश्न
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?
बेरीज
उत्तर
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.
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