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Wheels of a bus

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by harsh.champ » Wed Feb 17, 2010 4:44 am
The wheels of a bus are 1m in diameter.What is the number of revolutions made by the wheels per minute when the bus is travelling at 33 kmph ?

(A)291
(B)2.91
(C)175
(D)17
(E)1750
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by ajith » Wed Feb 17, 2010 4:53 am
harsh.champ wrote:The wheels of a bus are 1m in diameter.What is the number of revolutions made by the wheels per minute when the bus is travelling at 33 kmph ?

(A)291
(B)2.91
(C)175
(D)17
(E)1750
The distance travelled by the bus travelling at 33kmph in a minute = 33/60 *1000 meters = 11000/20

the diistance bus travels when one rotation is complete = pi =22/7 meters

No of rotations = 11000*7/(22*20) =175
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