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A cylindrical road solar made of iron is 1m long its internal diameter is 54cm and thickness of the iron sheet used in making roller is 9cm. Find the mass of roller if 1cm3 of iron has 7.8gm mas?

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Given internal radius of cylindrical road

Roller (r1) = 54/2 = 27cm

Given thickness of road roller (1/b) = 9cm

Let order radii of cylindrical road roller be R

Given height of cylindrical road roller (h) = 1m

h = 100cm.

Mass of roller (m) = 1388.7kg

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