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प्रश्न
The diameter of a wheel is 1.4m. How many revolutions does it make in moving a distance of 2.2 kms?
उत्तर
Diameter of the wheel = 1. 4 m
Circumference = 2 π r = π d
`= 22/7 xx 1.4`
= 4.4 m
Circumference= 8.8 m
Distance travelled = 2.2 km = 2200 m
No. of revolutions = `2200/4.4 = 500`
Wheel makes 500 revolutions in travelling 2.2 km
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