A boy is cycling such that the wheels of the cycle are making 140 revolutions per minute. If the diameter of the wheel is 60cm,calculate the speed per hour with which the boy is cycling. Please help! :O
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Revolution Per Minute = 140
Diameter = 60cm
Speed = ?
Circumference = 2(pi)r
=2*22/7*30
=188.57cm
Distance travelled in an hour = 60*140 per min*Circumference
=8400*188.57cm
=1583988cm
=15.83988km
Therefore, speed = 15.8 km per hour.
Diameter = 60cm
Speed = ?
Circumference = 2(pi)r
=2*22/7*30
=188.57cm
Distance travelled in an hour = 60*140 per min*Circumference
=8400*188.57cm
=1583988cm
=15.83988km
Therefore, speed = 15.8 km per hour.
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