a circle has an area of 144Pi Cm^2. Find Circumferance?

circumference = 2pi*r  where r is radius,  so  r = circumference/(2pi)

 

area = pi*r^2

 

So  area = pi*(circumference/(2pi))^2

 

Hence:  circumference = 2pi*sqrt(area/pi)

 

Can you take it from here?