How Tall Must a Water Column Be to Generate 100mmHg Pressure?

[tandoorichicken]

Homework Statement

I feel like I'm doing something seriously wrong here.

How tall must a column of water be to generate a pressure of 100mmHg?

Homework Equations

P = pgh, I think, is the only necessary equation.

The Attempt at a Solution

So... 100mmHg = 1 kg/m3 * 9.81 m/s2 * 1mmHg/133.322Pa * h

h = 1.36 km?

Seems a bit much, don't you think?

 

[Hootenanny]

So... 100mmHg = 1 kg/m3 * 9.81 m/s2 * 1mmHg/133.322Pa * h

What's the density of water again?