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A planet having mass 9 Me and radius 4Re, where Me and Re are mass

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A planet having mass 9 Me and radius 4Re, where Me and Re are mass and radius of earth respectively, has escape velocity in km/s given by

(Given escape velocity on earth Ve = 11.2 x 103 m/s)

(1) 67.2 

(2) 16.8 

(3) 33.6 

(4) 11.2

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Correct option is (2) 16.8

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