Question

the area of circle is 154 cm square then its circumference is

Answer 1

a = 154cm square

r = ?

a=πr²

154=22/7*r²

r²=154 x 7/22

r²=1078/22

r²=49

r=7 cm

c=2πr

c=2*22/7*7

c=2*22

c=44

Answer 2

area of a circle = πr^2
circumference of the circle = 2πr
π = 22/7
Given area = 154 cms squared
22/7 * r^2 = 154
r^2 = 154 * 7/22
r ^ 2= 49
r = 7
circumference = 2πr
2 * 22/7 * 7 = 44
and the answer is
44 cms