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Two persons P and Q crosses the river st...

Two persons P and Q crosses the river starting from point A on one side to exactly opposite point B on the other bank of the river. The person P crosses the river in the shortest path. The person Q crosses the river in shortest time and walks back to point B. Velocity of river is 3 kmph and speed of each boat is 5 kmph w.r.t river. If the two persons reach the point B in the same time, then the speed of walk of Q is

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To solve the problem, we will analyze the motion of both persons P and Q as they cross the river and determine the speed at which Q walks back to point B. ### Step-by-Step Solution: 1. **Understanding the Problem:** - Person P crosses the river in the shortest path, which means he goes straight from point A to point B. - Person Q crosses the river in the shortest time, which means he will have to account for the river's current and may not go straight to point B. ...
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