How to Solve ‘Boat Crossing River’ Numerical Problems of PHYSICS

We are going to learn here How to Solve ‘Boat Crossing River’ Numerical Problems of PHYSICS as this is a common question of 2D motion in mechanics.


Solved Example 1:

Question: A boat is sent across a river at a velocity of 8 km per hour. The resultant velocity of the boat is 10 km per hour. Find the velocity of the river?
(a) 2 km/hr     (b) 6 km/hr   (c) 5 km/hr   (d) 4 km/hr

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Solved Example 2:

Question: The speed of a boat is 5 km/hr in still water.  It crosses a river of width 1 km along the shortest possible path in 15 minutes. Find the speed of the river water.

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