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    A man travelled a distance of 72 km in 12 hours

    A man travelled a distance of 72 km in 12 hours. He travelled partly on foot at 5 km/hour and partly on bicycle at 10 km/hour. The distance travelled foot is
    (a) 46 km
    (b) 52 km
    (c) 50 km
    (d) 48 km

    Asked by Anurag Mishra on 26th March 2016 in Maths.
    1 Answers
    Professor

    Answer: (d) 48 km

    Solution:-

    Let the distance traveled on foot be x km.

    Then, distance traveled on bicycle = (72 –x) km.
    So,  X/5 + (72 – X)/10 = 12
    (2 X + 72 – X)/10 = 12
    X + 72 = 12 x 10
    X = 120 – 72
    X = 48 km

    Then, the distance traveled foot is 48 km.

    Hence, the correct answer is option (d) 48 km.

    Answered by Anurag Mishra on 26th March 2016..