Question

A wooden piece floats on water with 1/4th part outside. what is the density of wood.​

Answer 1

Use Archimedes principle

Buoyancy = Volume Submerged x density of liquid x g

This buoyancy supports the weight of wood

Let volume be V

Volume submerged = 3/4V

Density of wood = p,

density of water = d

so, V p g = 3/4 V d g

p = 3/4 d

this is the answer