The daimeter of a wheel of a bus is 90cm which makes 315 revolutions per minute. Determine its speed in kilometer per hour.
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the distance covered by wheel in 315 complete Revolution =315 x 2x 22/7 x 45= 89100cm
speed = 89100x 60/100000 = 53.46 km/ h
speed = 89100x 60/100000 = 53.46 km/ h
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