Question

A metal pipe is 77cm long, the inner diameter of the cross-section is 4cm and the outer diameter is 4.8cm .find the (1) inner curved surface area (2) outer curved surface area (3) total surface area​

Answer 1

Step-by-step explanation:

inner curved surface area =2πrh ,here r= inner radius

and h= height or length

outer curved surface area= similar , here r= outer radius

total= add inner and outer

radius=diameter divided by 2