Two cyclists start from the same place in opposite directions. One goes towards North at 18 km/h and the other goes South at 22 km/h. What is the distance between them after 30 minutes?
Explanation:
Let total distance be 120 km. First part = 40 km; Time = 40 / 40 = 1 hour. Remaining part = 80 km; Time = 80 / 80 = 1 hour. Total distance = 120 km, Total time = 2 hours. Average speed = 120 / 2 = 60 km/h.
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