Question

Area of circle is 154cm Find its circumference

Answer 1

Area of circle =pie *r square
, 154=22/7*r square
R square =154*7/22
R square =49
R= root49
R=7cm

Circumference of circle, =2*pie*r
=2*22/7*7
=44cm.

Answer 2

area=154cm^2
=>pi r^2=154
=>r^2=154÷pi
=>r=sqrt154÷pi


now circumference=2 pi r
=2 pi (sqrt154÷ pi)
=43.96



hope it helps u........