Question

the area of a circular lawn is 154 metres square find its circumference

Answer 1

Given:-
Area of circular lawn = 154 m²

Area of circular lawn = πr²
154 = 22/7*r²
r² = 154*7/22
r² = 49
r = 7 m

Circumference of circular lawn = 2πr
= 2*22/7*7
= 44 m Ans.

Ans.) Its circumference is 44 m.

Answer 2

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