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21 November, 08:53

A car has wheels which are 80 cm in diameter. How many complete revolutions does it will make in 10 minutes when the car is moving at a speed of 80km/hr?

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  1. 21 November, 11:23
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    Diameter=80cm

    circumference=2pi r

    =251.2=2.512

    speed = 80km/hr=4.8m/min

    time travelled in 10 min = 48 m

    number of revolution=48/2.512

    =19 revolutions
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