Newton's laws of motion can be applied to a block in liquid also force due to liquid (e.g. upthrust) are also considered in addition to to other forces. A small block of weight W is kept inside. The block is attached with a string connected to the bottom of the vessel. Tension in the string is `W//2`
If weight of the block is doubled then tension in the string becomes x times and the length calculated from above becomes y times then

Options

A. x=2
B. `y=sqrt(2)`
C. both (A) and (B) are correct
D. both (A) and (B) are wrong.

Answer

A