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Q.

If the escape velocity on earth is 11.2kms-1,its value for a planet having double the radius and 8 times the mass of the earth is

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a

10.2 kms-1

b

22.4 kms-1

c

10 kms-1

d

0

answer is B.

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Detailed Solution

V=2GM'R'=2G×8M2R=2×11.2=22.4 kms−1

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