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If the escape velocity on the earth is `11.2 km//s`, its value for a planet having double the radius and `8` times the mass of the earth is ...... (in

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If the escape velocity on the earth is `11.2 km//s`, its value for a planet having double the radius and `8` times the mass of the earth is ...... (in `Km//s`)
A. `11.2`
B. `22.4`
C. `5.6`
D. `8`
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Correct Answer - B
`v_(e)=sqrt((2GM)/R)rArr (v_(1))/(v_(2))=sqrt((M_(1))/(M_(2))(R_(2))/(R_(1)))`
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