SOLUTION: "A model car enthusiast has a remote control car. He starts out traveling North at 20km/h in his car. But his remote car starts at the same time traveling 30km/h to the West. Un

Question 208922: "A model car enthusiast has a remote control car. He starts out traveling North at 20km/h in his car. But his remote car starts at the same time traveling 30km/h to the West. Unfortunately the remote control radio has a range of only 10km so eventually the plane loses contact with the remote.
a. How long does it take for the remote and plane to lose contact? "

I've been at this one for quite some time now and still haven't found the right equation, I think it involves the Pythagorean Theorem, but I'm not entirely sure since it did not turn up any positive results.

Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
"A model car enthusiast has a remote control car. He starts out traveling North at 20km/h in his car. But his remote car starts at the same time traveling 30km/h to the West. Unfortunately the remote control radio has a range of only 10km so eventually the plane loses contact with the remote.
a. How long does it take for the remote and plane to lose contact? "
Is he in the car or the plane? Which way is the plane going?

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