A man is sitting in a boat, which is floating in a pond. If the man drink some water from the pond, will the level of water in the pond decrease ?

Options

A. equal to the earlier level
B. less than the earlier level
C. more than the earlier level
D. depends on how large the block is

Answer

B

Explanation

When iron block was floating, it displaces `V_(1)` volume of water such that weight of this `V_(1)` volume of water is equal to weight of block. But since density of iron is more than density of water, this volume `V_(1)` will be greater than volume `V_(2)` or iron block. When iron block sinks in the pond, it displaces water of volume equal to its own volume `V_(2)`.
Since `V_(1) gt V_(2)` displaced volume in first case was more than displaced volume in second case. Hence, level will fall.