Question

the difference between circumference and diameter of a circle is 120m. find the area of the circle.

Answer 1

2πr - 2r = 120
2r(22/7 -1) = 120
r = 60×7/15
r= 28 m

Area of circle :
= πr^2
= 22/7 × 28 × 28
= 22×4×28
= 2464 m sq.