2017年7月26日 星期三

How far has the bicycle travelled?

The radius of a wheel of a bicycle is 0.35m.When the wheel has made 1000 revolutions,how far has the bicycle travelled?


Radius of wheel r = 0.35m
Cicumference or say 1 revolution = 2πr = 0.7π m

Distance travelled
=Total distance travelled by 1000 revolution 
= 0.7π × 1000
= 700π m

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