Question

In a flask the level of water is 30 M after giving a stone of 20 gram the water rises to 35 M calculate the density

Answer 1

density = mass / volume
according to the question ...
mass = 20 gram
volume = final level of water - initial level of water
that is 35-30 =5
putting it up in the equation
density=mass/ volume
= 20/5
density = 4 gram / m cube