Question
A giant circular wheel has a diameter of 35 metres. In
how many revolutions will the wheel cover a total of 16.5 km?Solution
Radius of the giant wheel = 35 ÷ 2 = 17.5 metres Circumference of the giant wheel = 2 × π × radius = 2 × (22/7) × 17.5 = 110 metres So, number of rotations to cover 16.5 km i.e. 16500 metres = 16500 ÷ 110 = 150
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