Designing a Rocket Car for Maximum Distance

[Michal]

need urgent help!

I have to make a rocket car - powered by a balloon - demonstrating Netwon's Third Law. It must be made with a styrofoam meat tray for the base and wheels, and a straw to blow up the balloon.
How can i design it so it goes the furthest distance? What shape should the base be? How big should the wheels be? How heavy should it be?

If someone could help i'd greatly appreciate it!

 

[Hootenanny]

Don't triple post, it will not increase you chances of receiving a reply, it will serve more to annoy people. According to the rules of the forum, you are required to show at least a small amount of effort with your project before you can receive help.