Question

find the circumference of a circle each of whose area is 616 cm^2

Answer 1

Area of circle = 22/7 x r2
= 22/7 x r2 = 616 cm2
= r2 = 616 x 7/22
= r2 = 196
= r = 14
Circumference of circle = 2 x 22/7 x r
= 2 x 22/7 x 14
= 44/7 x 14
= 88 cm

Answer 2

pie r^2=616
r^2=616*7/22=28*7
r^2=196
r=14
circumstances of a circle = 2pie r=2*22/7*14=2*22*2=88