a boy moves once around the boundary of a circular track in 20 min. find the distance and displacement of the boy after 110min. if the radius of the track is 7m...
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the boy is moving around a circular track means its circumference and circumference equals to 2 Pi R. 2*22/7*7=44m.speed=44m/20min=22m/10min so the displacement =22/10*110=22*11=242m
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