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Q.

The escape velocity for the earth is 11.2 km/sec. The mass of another planet is 100 times that of the earth and its radius is 4 times that of the earth. The escape velocity for this planet will be

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a

112.0 km/s

b

5.6 km/s

c

280.0 km/s

d

56.0 km/s

answer is D.

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Detailed Solution

Escape velocity v=2 GMR⇒vpve=MpMe×ReRp⇒  vp=5ve=5×11.2=56  km​/​s
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