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Theradius of a wheel of a cycle is 70 em and it takes 5 minutes to make 300rotations. Find thespeed ofthe cycle in km per hour. |Take T- |
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Answer» Radius = 70 cmCircumference = 2πr = 2×22/7×70 = 440 cm5 min -- 300 rotationsSo, 1 rotation = 1 secondSo , speed = 440 cm/s = 1584000 cm / hr (*3600) = 15.84 km/hr |
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