U-tube with Equilibrium Configuration

[mparsons06]

Homework Statement

A U-tube of uniform cross-sectional area, open to the atmosphere, is partially filled with mercury. Water is then poured into both arms. If the equilibrium configuration of the tube is as shown in the figure, with h2 = 1.51 cm, determine the value of h1.

I'm not really sure where to start. Can someone help me please?

 

[ehild]

Think of Pascal's law.

ehild