Question

the area of circle is 38.5cm2 find its circumference​

Answer 1

Step-by-step explanation:

area of square =π r²

38.5 =22/7 x r²

38.5 x 7

--------------- = r²

22

12.25. = r²

3.5 = r

circumference = 2 π r

= 2 x 22 /7 x 3.5

= 2 x 22 x 0.5

=44 x 0.5

= 22