a solid cone of height 12cm and base radius 6 cm has the top of 4 cm remarked.find the whole surface area of the remaining frustrum of cone
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total surface area of frustrum
= πl (r1 +r2) +πr1^2+πr2^2
TSA=566.028
= πl (r1 +r2) +πr1^2+πr2^2
TSA=566.028
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