Brain Teaser?? Anyone Smart Enough?

A kangaroo chases a jackrabbit. The kangaroo takes 2 jumps while the jackrabbit takes 3 jumps. But each jump that the kangaroo takes covers as much distance as 2 of the jackrabbit's jumps. If at the beginning of the chase, the jackrabbit is 10 jumps ahead of the kangaroo, how many jumps will the rabbit take before the kangaroo catches him?