Question

Volume of a cylinder is 72πcm3.The area of its circular base is 9π.What is height of the cylinder.

A) 2cm
B) 8cm
C) 2π cm
D) 8π cm

Answer 1

Let height of the cylinder be H cm.

Area of circular base of the cylinder = πr² = 9π.

And,

Volume of cylinder = 72π

πr²H = 72π

9π H = 72π

H = 72π/9π

H = 8 cm

Height of cylinder = H = 8 cm.

Hence,

Option (B ) is right answer.