the total surface area of a cone of radius 2r and slant height l/2 is
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T.S.A.=πr(r+l)
T.S.A.=π×2r(2r+l/2)
T.S.A.=2πr×4r+l/2
T.S.A.=πr×2r+l
T.S.A.=2πr^2l
T.S.A.=π×2r(2r+l/2)
T.S.A.=2πr×4r+l/2
T.S.A.=πr×2r+l
T.S.A.=2πr^2l
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