The diameter of a wheel is 84 cm. How many revolutions will it make to cover 792 m?
Diameter of wheel = 84 cm
Radius of wheel = r = 84/2 cm = 42 cm
Distance the wheel travels = 792 m = 79200 cm
In 1 revolution wheel travels 2πr distance
No. of revolutions a wheel makes = 
= 
= 300 revolutions
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