A gun of mass 20 kg has bullet of mass 0...

A gun of mass 20 kg has bullet of mass 0.1 kg in it. The gun is free to recoil and 804 J of recoil energy is released on firing the gun. The speed of bullet (in `m s^(-1))` is

`sqrt(804 xx 2010)`

`sqrt((2010)/(804))`

`sqrt((804)/(2010))`

`sqrt(804 xx 4 xx 10^3)`

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