The frozen volume of water increases by11,so the volume ratio of water and ice with the same mass is 10: 1 1. Because it is a square container, the volume ratio is equal to the height ratio, so the height ratio of water and ice with the same mass is also 10: 1 1. Now the ice layer is 3.6 cm thick, so the volume of water is 3.6/1*10 = 36/11cm, so the thickness of water layer is12-36//kloc-0.