The base of a tank is horizontal glass plate 8 cm thick u 1

Last updated: 6/9/2023

The base of a tank is horizontal glass plate 8 cm thick u 1 6 Above this i layer of liquid of thickness 4 5 cm 1 5 and upon this floats a layer of wa 12 cm thick Looking from the above the apparent position of the spot 3 the bottom of the tank is 1 17 cm 2 19 cm 3 21 cm 4 35 cm