A Utube of uniform cross section is partly filled with water (density pW). Another liquid of density p that does not mix with water is poured into one side until it stands a distance (1 above the original water level. The water level rises by a distance l in the other arm (see the figure below). If (1 = 9 cm and l = 4 cm, what is the density of the liquid relative to that of water? Give your answer to two significant figures