Question

The density of ice is x gm/cc and that of water is y gm/cc. What is the change in volume in cc, when m gm of ice melts ?

Answer 1

Volume of ice = m/x,
Volume of water = m/y,
Change in volume = m/y-m/x = m(1/y-1/x).

Answer 2

Due to the physical state change of the water the volume changes a little bit not the mass, because the mass is a constant property of any substance.

So according to the data mentioned in the question:

Volume= mass/ density

Volume of water=m/y

Volume of ice= m/x

So the volume difference will be =

(m/x-m/y) {because due to the physical state change the allover volume increases in the ice form}