Question

find circumference and diameter of circle whose area is 6.16 cm2

Answer 1

Area of circle =6.16cm^2

=> π * r2 = 6.16

=> 22/7 *r2 = 6.16

=> r2 = 6.16*7/22

=> r2 = 0.28*7

=> r2 = 1.96

=> r = 1.4 cm

Circumference of circle = 2πr

=> 2*22*1.4/7

=> 44 * 0.2

=> 8.8cm

Answer 2

Hey friend, Here is your answer-
Area of circle = pie r2
6.16 = pie r2
r2 = 6.16 × 7 / 22
r2 = 1.96
r = 1.4 cm

Circumference= 2pie r
= 2× 22/7 × 1.4
= 8.8 cm

Diameter = 2r
= 2 × 1.4
= 2.8 cm

Hope it will help you.