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Two guns, sit...

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Two guns, situated on the top of a hill ofheight 10 m, fire one shot each with the same speed at some internal of time. One gun fires horizontally and other fires upward at an angle of 60 with the horizontal. The shots collide in air at a point P. Find (i) the time-internal between the fringes, and (ii) the coordinates of the point P. Takeorigin of the coordinate system at the foot of the hill rightbelow the muzzle and trajectories in x-y plane.

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