Question

The difference between the circumference and diameter of a circle is 30 cm. The area of the circle is​

Answer 1

Circumference Of a circle = 2πr

Area of a circle=πr^2

According To Question

2πr - 2r= 30

2r(π-1)=30

2r(15/7)=30 [22/7 -1 =15/7]

r=(30*7)/(15*2)

r= 7cm

Area = πr^2

(22/7 )*7 *7

= 154cm^2