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Find the total surface area of a closed cylindrical drum if its diameter is 50 cm and height is 45 cm. (π = 3.14) |
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Answer» Given: For cylindrical drum: Diameter (d) = 50 cm and height (h) = 45 cm To find: Total surface area of the cylindrical drum Diameter (d) = 50 cm ∴ radius (r) = d/2 = 50/2 = 25 cm Total surface area of the cylindrical drum = 2πr (h + r) = 2 x 3.14 x 25 (45 + 25) = 2 x 3.14 x 25 x 70 = 10,990 sq.cm ∴ The total surface area of the cylindrical drum is 10,990 sq.cm. |
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