Uniform circular motion - simple problem

[Femme_physics]

Homework Statement

A girl is running around a circular fountain with a diameter of 6.5m. If it takes her 72 seconds to run all the way around, what's her angular speed?

The Attempt at a Solution

I appear to be getting a wrong answer: (look only at the thick black marker)

http://img263.imageshack.us/img263/548/radsec.jpg

 

[Doc Al]

The time is 72 seconds not 1/72.

 

[Femme_physics]

Thanks Doc :) My silly err. you're awesome!

 

[tiny-tim]

Hi Femme_physics!

Why do you write π like that?

Shouldn't π have a hat to keep its legs cool? ​

 

[Femme_physics]

Heh, you're on to me tiny-tim ;) I don't know how to properly write pi! I'll work on that :-)