find the total surface area of a cone of radius r/2 and slant height 2l
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Step-by-step explanation:
Total Sa of a cone=πr²l+πr²
=πr(l+r)
=π*(r/2)(2l+r/2)
=πr/2*(2(l+r))
=πr(l+r)
=TSA of a cone with radius r and slant height l
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