The solid is composed of a cylinder with hemispherical ends. If the whole length of the solid is 108cm and the diameter of the hemispherical ends is 36cm, find the cost of polishing the surface of the solid at the rate of 7 paise per sq. cm `(U s epi=(22)/7)`

Explanation

radius of the cylinder `=r1=18cm`


height of the cylinder `h=72cm`


total surface area
= curved surface area of the cylinder + surface areas of hemispherical ends


`=(2πrh+2×2πr^2)cm2=(2πrh+4πr^2)cm2=2πr(h+2r)cm^2`
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