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    Question

    A train covers a distance of 40 km at the speed of 30

    km/h the next 33 km distance covers with a speed of 44 km/h and last 80 km with the speed of 64 km/h find the average speed of the train?
    A 59.75 km/hr Correct Answer Incorrect Answer
    B 41 km/hr Correct Answer Incorrect Answer
    C 52 km/hr Correct Answer Incorrect Answer
    D 45.9 km/hr Correct Answer Incorrect Answer

    Solution

    Since the train covers different distance with different speeds. So, Average speed = Total Distance/Total Time Total distance = 40 + 33 + 80 = 153 km Time1 = 40/30, Time2 = 33/44 & Time3 = 80/64 Total Time = 40/30 + 33/44 + 80/64 Therefore, Average Speed = 153/(40/30 + 33/44 + 80/64) = 45.9 km/hr

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