How much metal sheet is required to make an open cylindrical tank of radius 4.2 m and height 15 m ?
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metal sheet required = total surface area of a cylinder
= 2pier^2h
=2×22/7×4.2×4.2×15
=1663.2m^2
= 2pier^2h
=2×22/7×4.2×4.2×15
=1663.2m^2
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