What is the surface area of a cylinder with a top area of 36pi and a height of 20cm
You will need the radius
πr^2 = 36π
r^2 = 36
r = 6
So the surface area around the cylinder, a rectangle
= 2πrh
= 2π(6)(2) = 24π
total surface area = 2 circles + 1 rectangle
= 2(36π) + 24π = 96π