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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 $$\pi = \frac{22}{7}$$]

A) 2.5

B) 5

C) 25

D) 50

### Explanation:

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

## Dicussion (1)

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