Question

Find the area of circle whose circumference is 22cm

Answer 1

Solution :-

Given - Circumference of circle = 22 cm

Let the radius of the given circle be 'r'

Circumference of a circle = 2πr

⇒ 22 = 2 × 22/7 × r

⇒ r = (22 × 7)/(22 × 2)

⇒ r = 154/44

⇒ r = 3.5 cm

Area of circle = πr²

⇒ 22/7 × 3.5 × 3.5

⇒ 269.5/7

= 38.5 cm²

So, the area of the given circle is 38.5 cm²

Answer 2

circumference is 22 CM

let r be the radius of circle

2 pie r is 22

2×22/7×r=22

r=7/2

area of circle is pie ×r^2=22/7×7/2×7/2 cm2 = 38.5cm2