Potential difference across capacitors, can someone check this?

[JFonseka]

Homework Statement

What is the potential difference across C2 when C1 = 5.0 µF, C2 = 15 µF, C3 = 30 µF, and V0 = 24 V?
http://img503.imageshack.us/img503/9994/capacitanceqb1.jpg

Homework Equations

C = Q/V

The Attempt at a Solution

I calculated total capacitance of C1 and C3 in parallel, that is 3.5 x 10^-5 Farads.

So the charge going across is Q = CV = 3.5x10^-5 x 24 = 8.4 x 10^-4 C

Therefore the voltage going across the other capacitor is V = Q/C, which 8.4x10^-4/15x10^-6 = 56V

Which looks really wrong.

Help?

Thanks in advance.

 

[JFonseka]

Wait I redid it. I first calculated the total capacitance which turned out to be 1.5x10^-5 Farads.

Got the total charge by Q = CV, 1.5x10^-5 x 24 = 3.6x10^-4 C

3.6x10^-4/15x10^-6 = 24 V

So is that right?