A metal pipe is 77cm long. The inner diameter of a cross section is 4cm, the outer diameter being 4.4 cm. Find its inner curved surface area. outer curved surface area. total surface area.

Explanation

Inner curved surface area=`2pirh`
`=2xx22//7xx2xx77`
=`968 cm^2`
Outer area(curved surface)=`2pirh`
=`2xx22//72.2xx77`
=`1064.8 cm^2`
Total area=`968+1064.8+2(piR^2-r^2)`
=`2032.8+2xx22//7(4.84-4)`
`2032.8+5.28`
=`2038.08`