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Question

Mark the correct answer.

Assertion(A): The total surface area of a cone whose radius is r2 and slant height 2l is πr(l+r4)

Reason(R): Total surface area of cone is πr(l+r) where r is radius and l is the slant height of the cone.



A
Both A and R are true, and R is the correct explanation of A.
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B
A is false but R is true.
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C
Both A and R are true, but R is not the correct explanation of A.
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D
A is true but R is false.
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