What is the height of a solid right circular cylinder whose radius is 3 cm and total surface area is 60 π cm2?

3 cm 5 cm 7 cm 9 cm

7 cm

We know that, Total surface area of cylinder = 2πr(r + h) We have, Radius of right circular cylinder = 3 cm. Total surface area of cylinder = 60π cm². Total surface area of cylinder =  2 π r (r + h) = 60π = 2 π × 3(3 + h) = 60π = (3 + h) = 10 = h = 7 cm