Question

The diameter of a wheel is $98cm$ The number of revolutions it will have to make to cover a distance of $1540m$ is

• A. 500
• B. 600
• C. 700
• D. 800

Answer 1

The correct option is A 500

Given the diameter of wheel is $98cm$

Then radius of wheel =$\frac{98}{2}=49cm$

Then circumference of wheel $=2\pi r$

$=2\times \frac{22}{7}\times 49=308cm$

the number of revolutions to be made to cover a distance of $1540m=\frac{1540\times 100cm}{308cm}$

$=\frac{154000}{308}=500$