a wheel of cart makes 5 revolutions per second. if the diameter of the wheel is 84cm,find it's speed in km/hr.
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radius of wheel = 42 cm
circumference = 2×π×42 = 264 cm
5 revolution = 5×264 = 1320cm
it covers 5 revolution in 1 second
= 1320cm in 1sec
=(1320× 3600) ÷ (1×1000) = 4752 km/hr
circumference = 2×π×42 = 264 cm
5 revolution = 5×264 = 1320cm
it covers 5 revolution in 1 second
= 1320cm in 1sec
=(1320× 3600) ÷ (1×1000) = 4752 km/hr
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