The diameter of a wheel of a car is 70cm.How many revolutions will it make to travel 99km?
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GIVEN:
Diameter of the wheel=70cm=0.7m [∵1cm=1/100m]
Distance covered by the wheel=99km=99000m [∵1km=1000m]
TO FIND:
No.of revolutions
SOLUTION:
circumference of the wheel=πd=22/7×0.7=2.2m
We know that,
no.of revolutions=distance covered/circumference
n=99000/2.2
n=45000 revolutions
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