Questions

The escape velocity from the earth is about 11 km/sec. The escape velocity from a planet having twice the radius and the same mean density as the earth is :

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22 km/sec

11 km/sec

5.5 km/sec

15.5 km/sec

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detailed solution

Correct option is A

ve=2GMR=83πGρR2 as M=43πR3ρ

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