Apurva travelled equal distances at speeds of 10 km/hr, 20 km/hr, and 6 km/hr, and took a total time of 19 minutes. Find the total distance travelled in km.

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Answer: (A) 3

Explanation

Let each part be d km. Time = d/10 + d/20 + d/6 = d(6 + 3 + 10)/60 = 19d/60 hours = 19 minutes, so d = 1 and the total distance = 3 km.