In a spring gun having spring constant 100N/m a small ball 'B' of mass 100g is put in its barrel (as shown in figure) by compressing the spring through 0.05m. There should be a box placed at a distance 'd' on the ground so that the ball falls in it. If the ball leaves the gun horizontally at a height 2m of above the ground. The value of d is ___ m.(g=10m/s 2 )
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