A cube of ice is floating in water contained in a vessel. When the ice melts, the level of water in the vessel
rises
falls
remains unchanged
falls at first and then rises to the same height as before.
The weight of the floating ice is equal to the weight of water displaced by it. So, when the ice melts, the volume of water produced by the melting ice is equal to the volume of water displaced by the ice cube. Hence the correct choice is (c).