Application of DerivativeHard

Question

The radius of a right circular cylinder of greatest curved surface which can be inscribed in a given right circular cone is

Options

A.one third that of the cone
B.1/√2 times that of the cone
C.2/3 that of the cone
D.1/2 that of the cone

Solution



S = 2πrh
= 2πH

Maximum at r = R/2

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