the diameter and the height of a cylindrical petrol storage tanks are 4.2 M and 4.5 M respectively. find its curved surface area and how much Steel was actually used if 1/12th of the Steel was wasted in making the tank
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Csa(cylinder) =2iirh=297/5=59.4m2 steel actually used=59.4-1/12x59.4=54.4m2
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