Mathematics · Speed, Time and Distance
Three runners, X, Y and Z, run on a circular track of circumference 500 m. They all start from the same point at the same time. X runs at 4 m/s, Y at 5 m/s and Z at 10 m/s, all in the same direction. After how much time will all three runners be at the same point for the second time?
- 116 minutes and 20 seconds
- 216 minutes and 30 seconds
- 316 minutes and 40 seconds✓
- 416 minutes and 50 seconds
Correct answer
16 minutes and 40 seconds
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