A bullet from gun is fired at a muzzle speed of 50 m/s to hit a largest 125 m away at the same horizontal level . At what angle from the horizontal should the gun be aimed to hit the target ( consider g = 10 m/s2 )

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The answer is trial 3.

The boat's velocity relative to the riverbank can be resolved into two components. the component going north is 2.7 m/s and the component going west is 1.2 m/s.we add these two vectors and then find the magnitude of the resultant to get the speed.the magnitude of the resultant vector from adding can be obtained by the pythagorean theorem.    to two significant figures, the boat's speed relative to the riverbank is 3.0 m/s.