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A projectile of mass 3m is projected fro...

A projectile of mass 3m is projected from ground with velocity `20sqrt2 m//s` at `45^@`. At highest point it explodes into two pieces. One of mass 2m and the other of mass m. Both the pieces fly off horizontally in opposite directions. Mass 2m falls at a distance of `100m` from point of projection. Find the distance of second mass from point of projection where it strikes the ground.
`(g=10m//s^2)`

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