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Three spheres, each of mass 'm' and radi...

Three spheres, each of mass 'm' and radius 'R' are kept in touch with each other such that their centres from an equilateral triangle. The M.I. of the system about a median of triangle is

A

`(21)/(5)"MR"^(2)`

B

`(16)/(5)"MR"^(2)`

C

`(7)/(2)"MR"^(2)`

D

`(4)/(5)"MR"^(2)`

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The correct Answer is:
B
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