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A small block of mass M moves with veloc...

A small block of mass M moves with velocity 5 m/s towards an another block of same mass M placed at a distance of 2 m on a rough horizontal surface . Coefficient of friction between the blocks and ground is `0.25` . Collision between the two blocks is elastic , the separation between the blocks , when both of them come to rest , is ( g = `10 m//s^(2)`)

A

3 m

B

4 m

C

2 m

D

1.5 m

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A
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