Question

A bicycle wheel makes $5000$ revolution in moving $11km$. Find the diameter of the wheel.

Answer 1

$5000$ revolution $=11km=11000m$

$\Rightarrow 5000\times 2\pi \times r=11000\Rightarrow r=\frac{11000}{2\pi \times 5000}=\frac{11\times 7}{2\times 22\times 5}=\frac{77}{220}cm$