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The masses and radii of the Earth and th...

The masses and radii of the Earth and the Moon are `M_(e), R_(e)` and `M_(m), R_(m)` respectively. Their centres are at a distance `r` apart. The minimum speed with which a particel of mass `m` should be projected from a point midway between the two centres so as to escape to infinity is ........

A

`sqrt((4G)/r(m_(e)+M_(m)))`

B

`(4G)/rsqrt((m_(e)+M_(m)))`

C

`sqrt((2G)/r(M_(e)+M_(m)))`

D

`(2G)/rsqrt((M_(e)+M_(m)))`

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The correct Answer is:
A
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