Question

A man is sitting in a boat which is floating in a pond. If the man drinks some water from the pond, the level of water in the pond.
A. increases
B. decreases
C. remains unchanged
D. increases or decreases depends upon the weight of man

Answer 1

In order to answer this question, to know about the level of water in the pond, we will discuss the whole phenomenon and the reason behind the correct option. And then we will discuss more examples on the level of water.

Complete answer:
When a man is sitting in a boat which is floating in a pond. If the man drinks some water from the pond, the level of water in the pond will remain unchanged. The boat will sink slightly as the man's weight increases, displacing the same amount of water consumed by the man. As a result, the pond's water level has risen to the same level as when the man drank the water. As a result, the water level will remain unchanged.

Here we discuss some other questions on the level of water in the pond- The rock is thrown overboard and sinks to the pond's bottom. "Does the pond's water level rise, fall, or stay the same?" Students see Archimedes' principle in action as a toy boat is placed in a container of water and a rock is placed on the floating boat in this model replica of the challenge question.

Here, another question arises is what happens when a boat is submerged in water? So, the boat would rise until only one litre, or $1000\,\text{cubic centimetres}$ , of its hull volume was left below the water line. When anything is submerged in water, it will displace an equal amount of water. When anything floats in water, it displaces the same quantity of water as its weight.

Hence, the correct option is C.

Note: As we know, the given question belongs to the Archimedes principle. So, the best example for this principle is the submarines under the water. Submarines are constantly submerged because they include a component called a ballast tank that allows water to enter, causing the submarine to be in its submerged position since the submarine's weight is higher than the buoyant force.