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The shooter at point "P" aims his rifle ...

The shooter at point "P" aims his rifle at an angle of `20^(0)` with horizontal to hit an object at "A" but the bullet hits at the point "B" ,a vertical distance `delta` below "A" .If the initial velocity of the bullet is `600ms^(-1)` and the point "P" is at a horizontal distance of 1000m from the point "A" ,the value of `delta`

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