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.