Question

how many times a wheel of radius 21cm must rotate to go 924 m?

Answer 1

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Answer 2

The wheel will rotate 700 times.

Given data :

Wheel's radius = 21 cm

Total distance to cover = 924 m = 92400 cm

So,the wheel's perimeter = 2×π×21 = 2 × 22/7 × 21 = 132 cm

The wheel will cover 132 cm in one rotation

So, he will complete 92400 cm in = (92400÷132) = 700 rotations (answer)