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If the ratio of base radius and height of a cone is 1 : 2 and percentage error in radius is λ%,

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If the ratio of base radius and height of a cone is 1 : 2 and percentage error in radius is λ%, then the error in its volume is:

A. λ%

B. 2λ%

C. 3λ%

D. None of these

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Best answer

Correct answer is C.

Given that the radius is half then the height of the cone so

Let h = 2r (where r is radius and h is height of the cone)

Volume of the cone = v

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