Question

How much distance, in metres, a wheel of 25 cm radius will cover, if it rotates 350 times?

Answer 1

Given, radius of wheel $\left(r\right)=25cm=\frac{25}{100}m=\frac{1}{4}m[\because 1cm=\frac{1}{100}m]$
$\because$ Distance travelled in one rotation $=2\pi r=2\times \frac{22}{7}\times \frac{1}{4}=\frac{11}{7}m$
$\therefore$ Distnace travelled in 350 rotation $=\frac{11}{7}\times 350=550m$
Hence, the wheel covers 550 m distance.