Ira and Jaya start at diametrically opposite points of a 1 km track and run towards each other at 4 m/s and 6 m/s. After how many seconds do they meet for the third time?

Question

Accepted Answer

250 s. The first meeting needs half a lap, 500 m, at 10 m/s: 50 s. Each later meeting needs a full lap: 100 s. Third meeting =50+2×100=250 s. (300 s assumes they started together.)

Ira and Jaya start at diametrically opposite points of a 1 km track and run towards each other at 4 m/s and 6 m/s. After how many seconds do they meet for the third time?

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