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A bicycle wheel of radius 42cm is rolled over a distance 66 meters. How many rev...


Question

A bicycle wheel of radius 42cm is rolled over a distance 66 meters. How many revolutions does it make?[Take \(\pi = \frac{22}{7}\)]

Options

A) 2.5

B) 5

C) 25

D) 50

The correct answer is C.

Explanation:

circumference of the bicycle wheel
\(= 2\pi r = 2 \times \frac{22}{7} \times 42 - 264cm = 2.64m\\\)
Number of revolution
\(=\frac{66}{2.64} = 25\)

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