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Question

In covering a distance s metres, a circular wheel of radius r metres makes s2πr revolutions. Is this statement true? Why?

A
Yes,thenumberofrevolutionn=s2πrasitcovers2πrmeterinonerevolution.
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B
Yes,thenumberofrevolutionn=s2πrasitcovers2πdmeterinonerevolution.
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C
Yes,thenumberofrevolutionn=s2πrasitcoversπrmeterinonerevolution.
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D
Both options B & C
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Solution

The correct option is A Yes,thenumberofrevolutionn=s2πrasitcovers2πrmeterinonerevolution.
Thenumberofrevolutionn,madebyawheeltocoveradistanceisn=distancecicumference.solGivenrmeteristheradiusofacircle.Itcoversadistancesmeters.Tofindoutthenumberofrevolutionn,madebythewheeltocoveradistancesmeters.SolutionThecicumfereceofthewheel=2πrmeter.Itcovers2πrmeterinonerevolution.Thenumberofrevolutionn,madebythewheeltocoveradistanceisn=distancecicumference.n=s2πr.SothethestatementiscorrectAnsOptionA.

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