find the T.S.A of a cone whose radius is r /2 and slant height is 2l
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Step-by-step explanation:
Radius of cone=r/2 Slant height of cone=2l
Total surface are of cone=π×r/2×2l+ π ×(r/2)²
=πrl+π×r²/4
=πr(l+r/4)
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