Question

a metal pipe is 77cm long. the inner diameter of a cross section is 4cm, the outer diameter being 4.4cm. Find its tsa​

Answer 1

Inner radius: 2cm

Outer radius: 2.2cm

Therefore Total Surface Area is equal to

2×π【R^2-r^2】

2×22/7【2.2^2 - 2^2】

6.0

Now adding 6.0 in Inner CSA and Outer CSA

968+1064.8+6.0=2038.8

Ans【2038.8】cm^2.

Answer 2

hope it's help u............