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The total surface area of a right circular cone of slant height 13 cm is 90π cm^2. Calculate:

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The total surface area of a right circular cone of slant height 13 cm is 90π cm2. 

Calculate:

(i) its radius in cm

(ii) its volume in cm3 [Take π = 3.14]

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1 Answer

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Best answer

Either r+18 = 0, then r = -18 which is not possible

or r – 5 = 0, then r = 5

Therefore, radius = 5 cm

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