1. The sum of the radius and height of a cylinder is 18 metre. The total surface area of the cylinder is 792 sq. metre, what is the volume of the cylinder ? (in cubic metre)
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By: anil on 05 May 2019 01.36 am
let the height and radius of cylinder be H mtr and R mtr R + H = 18 total surface area of cylinder = 2$$arwedge$$RH + 2$$arwedge(R)^2$$ = 792 R(H + R) = $$frac{792x7}{22x2}$$ R = 7 mtr H = 18-7 = 11 mtr volume = $$frac{22}{7}(R)^2(H)$$ Volume = 1694 cubic mtr
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