Question

Three tins filled with water have holes of the same size and are kept on a level surface as shown.
The stream of water falls out the fastest through the:

• A. middle hole in case (P).
• B. upper hole in case (Q).
• C. lowest hole in case (R).
• D. upper hole in case (R).
  

Answer 1

The correct option is C lowest hole in case (R).

The pressure exerted by water in all directions is the same at the same depth. The pressure of the water increases with depth and is independent of the size or shape of the container.
So, at a point where pressure is more, the force will also be more and hence the jet speed of the water stream will also be more.
Therefore, the stream of water will fall out with maximum jet speed at the lowest holes of tins in cases (Q) and (R). This is because the lowest holes in cases (Q) and (R) are at the same depth and also at the lowest point amongst all the holes in the three tins.