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The radius of the wheel of a bus is 25 cm.if the speed of the bus is 33 kmph ,then how many revolutions will the wheel make in 1 minute |
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Answer» v= 33kmph= 33km/60min =11/20 km per min Circumference of tyre is C= 2πr = 2π(25cm)= 2π(25×10-5km) =5π×10-4km .......this is distance travelled in one revolution. no.of rev per min = dis travel per min/ dis in one rev = (11/20)/(5π×10-4) = 350 rev per min
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