Starting together, two joggers go the same way round a 480 m track at 2.5 m/s and 4.5 m/s. After how many seconds does the faster one first catch up with the slower?

Question

Accepted Answer

240 s. Same direction: the faster gains 4.5-2.5=2 m each second and needs a full 480 m: 480/2=240 s.

Starting together, two joggers go the same way round a 480 m track at 2.5 m/s and 4.5 m/s. After how many seconds does the faster one first catch up with the slower?

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