Question

find the ratio of lateral surface area & total surface area of cone​

Answer 1

πrl:πr(r+l)

l:r+l

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Answer 2

The lateral surface area of a cone is the area of the lateral or side surface only.

Since a cone is closely related to a pyramid , the formulas for their surface areas are related.

Remember, the formulas for the lateral surface area of a pyramid is 12pl and the total surface area is 12pl+B .

Since the base of a cone is a circle, we substitute 2πr for p and πr2 for B where r is the radius of the base of the cylinder.

So, the formula for the lateral surface area of a right cone is L.S.A=πrl , where l is the slant height of the cone .