Another vector application problem

Hello, somewhere along the line I got stuck again. Again, any help would be really appreciated! This time the problem didn't state much that's why I'm in a dilemma.

"An air traffic patrol helicopter hovering at C sights a vehicle at A. One minute later the vehicle is at B. points A, B and C are int he same vertical plane. Find the speed of the vehicle in miles per hour."

Here's the picture that follows it.
http://i46.tinypic.com/2mwa2jo.jpg
PS. If you are befuddle by the picture, the 72° is from the top horizontal line to line CA while the 37° is from top horizontal line to line CB. I tried to make it look as neat as possible so sorry if you think it is messy.

Hello, wanderlust!

Quote:

---

An air traffic patrol helicopter hovering at sights a vehicle at
One minute later the vehicle is at
Find the speed of the vehicle in miles per hour.

---

Code:

---

              - - - - - - - - - - - o C
                            37°  * *|
                              *35°* |
                          *    *  |
                        *      *18°|
                    *        *    | 3000
                  *          *    |
              *            *      |
            *              *      |
        * 37°        108° * 72°    |
      o - - - - - - - - - o - - - - *
      B        x        A        D

---

Let:
We can determine all the angle in the problem.
. . (I hope you followed that.)


In right triangle


In


Hence, the card drove 3006.4 feet in one minute.

That's 180,384 feet in one hour,
. . or about 34.2 miles in one hour.

The speed of the car is 34.2 mph.