The given figure shows a metal pipe 77 cm long. The inner diameter of a cross-section is 4 cm and the outer one is 4.4 cm.

Find its inner curved surface area

Question

The given figure shows a metal pipe 77 cm long The inner diameter of a crosssection is 4 cm and the outer one is 44 cm Find its inner curved surface area

Accepted Answer

Solution The space that is covered by the curved surface of a cylinder and the flat surface of its bases is known as the surface area of a cylinder Given height of the metal pipe 77 cm Inner diameter 4 cm Inner radius r d2 42 2 cm Outer diameter 44 cm Outer radius R d2 442 22 cm Inner curved surface area 2 rh 2227277 968 cmsup2sup Hence the inner surface area is 968 cmsup2sup

ML Aggarwal Solutions Class 10 Mathematics Solutions for Mensuration Exercise 17.1 in Chapter 17 - Mensuration