Question

A horse is tied to pole with $21$m long string. Find the area where the horse can graze.

Answer 1

Since the horse is tied to a pole, the pole becomes the center of circle and the length of string becomes the radius.

Radius $\left(r\right)=21m$

Area where horse can graze $=$ Area of a circle

$=\pi r^2$

$=\frac{22}{7}\times 21\times 21$

$=22\times 3\times 21$

$=1386m^2$