Question

The circumference of a circle is 39.6 cm. Find its area.

Answer 1

Circumference = 39.6 cm
We know:
Circumference of a circle = 2πr

`=> 39.6 = 2 xx 22/7xx"r"`

`=>(39.6xx7)/(2xx22) = r`

⇒ r = 6.3  cm

Also,

Area of the circle = πr² 

`=22/7xx6.3xx6.3`

= 124.74 cm²