Give a quick stream of consciousness before answering the following question. A person travels at a speed of 10 mph from one city to another. However while returning as there was not much traffic. He came with a speed of 15mph. what is his average speed?\nOptions:\n(A) 10Kmph\n(B) 11Kmph\n(C) 12Kmph\n(D) 13Kmph\n(E) 14Kmph
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Average speed = 2xy/(x+y) = (2*15*10)/25 = 12Kmph
The answer: (C).
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