Question

A wheel has a radius of 70 cm. How many revolutions of the wheel are needed to cover a distance of 44 m?

• A. 4
• B. 8
• C. 10
• D. 14

Answer 1

The correct option is C

10

Given, radius of the wheel, r = 70 cm = 0.7 m

We know that the distance covered in one revolution of the wheel is given by its circumference.

$\therefore$ Circumference = $2\pi r=2\times \frac{22}{7}\times .7=4.4m$

Hence, the distance covered in one revolution of the wheel is 4.4 m.

Number of revolutions of the wheel needed to cover a distance of 44m = $\frac{44}{4.4}=10$