Question

a water has ice in it, when the ice melts. what is the difference between intial and final value of level of water

Answer 1

If you add ice to the water, that means the volume increases.

Answer 2

The ice floats on water because it is less dense than water and displaces water. When the ice melts the level of the water plus the melted ice is the same as the level of the water with the ice floating on top of it.