Two cyclists ride round a 1.5 km circular track in the same direction at 18 km/h and 27 km/h, starting together. After how many minutes will the faster one first overtake the slower?
Correct answer A. 10 minutes
Explanation
Relative speed = 27 − 18 = 9 km/h = 2.5 m/s. Gaining one full lap of 1500 m takes 600 seconds = 10 minutes.
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