The frame of lamp shape is cylindrical in shape it has base diameter 28 cm and height 17 cm It is to be covered with a decorative cloth.A margin of 2 cm is to be given for folding it over top and bottom of the frame if 1 /12 of cloth is wasted in cutting and pasting find how much cloth is required to be purchased for covering the frame
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it's formula is 2×(l+b)
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