an athlete completes a circular track of radious100m in 40 seconds. find his distance and displacement after(a)3minutes(b)4minutes
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circumference of track=2πr
=2×22/7×100
=628.57 metres
this is covered in 40 seconds
628.57 metres=40seconds
? metres. =180 seconds(3 min)
by cross multiplying,
distance covered in 3 min=(628.57×180)/40
=2825.565 metres
628.57 metres=40seconds
? metres. =240 seconds(4 min)
by cross multiplying,
distance covered in 4 min=(628.57×240)/40
=3771.42 metres