Question

A uniform cylinder of length l and mass m having cross-sectional area a is suspended, with its length vertical, form a fixed point by a mass less spring, such that it is half submerged in a liquid of density σat equilibrium position. when the cylinder is given a downward push and released, it stats oscillating vertically with a small amplitude. the time period t of the oscillations of the cylinder will be:

Answer 1

this is very hard for me hope yoy understand