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    Question

    Two trains for Mumbai leave Delhi at 6 a.m. and 6:30

    a.m. and travel at 100 km/h and 136 km/h respectively. Approx. how many km from Delhi will the two trains be together?
    A 125km Correct Answer Incorrect Answer
    B 160km Correct Answer Incorrect Answer
    C 188km Correct Answer Incorrect Answer
    D 121km Correct Answer Incorrect Answer
    E 120km Correct Answer Incorrect Answer

    Solution

    Since the faster train left Delhi in 30 minutes after the slower train Distance traveled by the slower train in 0.5hours = 0.5 × 100 = 50 km … {30 minutes = (30/60) 0.5hours} The relative speed of given two trains while. travelling in the same direction = 136 -100 = 36km/h time after which they meet =50/36 = 1.38 approx. travel distance = 1.38 ×136 = 188km

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