Question

A circular park is surrounded by a rod $21m$ wide. If the radius of the park is $105m$, find the area of the road.

Answer 1

Area of Road $=Perimeter\times Widthofroad=2\pi r\times 21=42\ast \pi \ast 105=42\ast 105\ast \frac{22}{7}=6\ast 105\ast 22=13860m^2$