Question

The difference between outer and inner curved surface areas of a hollow right circular cylinder 14cm long is 88cm² . If the volume of metal used in making cylinder is 176cm³ . find the outer and inner diameters of the cylinder____?

Answer 1

Given height of a hollow cylinder = 14cm

Let internal and external radii of hollow

Cylinder be ‘r’ and R

Given that difference between inner and outer

Curved surface = 88cm²

Curved surface area of cylinder (hollow)

Therefore, Internal radii of hollow cylinder = 1.5cm

External radii of hollow cylinder = 2.5cm