Question

Find the area of a circular park whose circumference is 22 m.

Answer 1

Let the radius of the circle = r m
The circumference of the circle = 22m (given)

`= > \: \: 2\pi \: r = 22`

`= > r = (22)/(2\pi) = (22 * 7)/(2 * 22) = (7)/(2) m`
Hence, area of the circle

`= \pi \: r {}^(2) = (22)/(7) * (7)/(2) * (7)/(2) = (11 * 7)/(2) = 38.5 \: m {}^(2)`