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It is required to make a closed cylindrical tank of height 1 m and base diameter 140 cm from a metal sheet.

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It is required to make a closed cylindrical tank of height 1 m and base diameter 140 cm from a metal sheet. How many square meters of the sheet are required for the same?

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Height of the cylindrical tank (h) = 1 m

Base radius of cylindrical tank (r) = 140/2 m = 70 cm = 0.7 m

Area of sheet required – total surface area of tank = 2π(r+h)

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