Question

the area of a circular lawn is 154 find its circumference​

Answer 1

let radius of the circular lawn =r m

area =A =154 ^2

pi*r^2=154

r^2=154/pi

r^2= (154×7)/22

r^2= (7*7)

r=7m

circumference=C=2*pi*r

=2*22/7*7

=44m