Question

A wheel makes 1000 revolutions in covering a distance of 88 km.Find the radius of the wheel.

Answer 1

Distance covered in one revolution $=\frac{88\times 1000}{1000}=88m$

$2\pi R=88\Rightarrow 2\times \frac{22}{7}\times R=88$

$\Rightarrow R=88\times \frac{7}{22}\times \frac{1}{2}$

$R=14m$.