Question

An ice cube floats on the surface of a glass of water (density of ice = 0.9 g/cm³). When the ice melts will the water level in the glass rise?

Answer 1

Yes, the water level rises. 

Reason : 

The ice cube floats on water, because its density is less than the density of water. When ice cube melts, it becomes water, so that the water level rises.