The escape velocity of a body on an imaginary planet which is thrice the radius of the earth and double the mass of the earth is (ve is the escape velocity of earth)

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2/3 ve

3/2 ve

2/3 ve

answer is A.

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Detailed Solution

vpve=MpMe×ReRp=2MeMe×Re3Re=2×13=23 ∴vp=23ve

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