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a rectangular sheet of paper 44cmx20cmis rollef along its length to form a cylinder.find total surface area so formed |
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Answer» Its folded along its LENGTH so its length will be circumference of the base 2 πr = 44 πr = 22 22/7 r = 22 r = 7 CM height = 20 cm curved surface area of cylinder =2 πrh = 2 X 22/7 × 7 × 20 = 880 square cm area of top and base of cylinder = 2 π * r2 = 2 x 22/7 x 7 x 7 = 308 square cm total surface area = 880 + 308 = 1188 cm sq |
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