Question

The area of a circle is 38.5 sq cm .it's circumference in cm is (use π=22/7) find the solution

Answer 1

area of circle =38.5cm²

πr²= 38.5

22/7*r²= 38.5

r²= 38.5*7/22

r²=12.25

r=√12.25

r= 3.5cm

. '. Circumference of the circle=2πr

=2*22/7*3.5

=22cm

Hope it helps u

Answer 2

Area=38.5 sq cm

Therefore:π r sq=38.5 sq cm

22/7×r×r=38.5

22×r×r=38.5×7

r×r=296.5÷22

r×r=12.25

r=3.5

2πr= circumference

22/7×7=circumference

:. 22cm=circumference