1) A closed cylindrical tank of radius 7cm and height 3m. is made from a sheet of metal. how much sheet of metal is required. also find the volume of cylindrical tank
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Volume of cylindrical tank = 22/7× 7×7×3= 462cm cube
Total surface area of the cylinder = Number of sheet of metal required = 2× 22/7×7(7+3)= 2×22/7×7×10=440 cm square
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