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    Question

    A person travels from city A to city B at 60 km/h and

    returns at 40 km/h. If the total time taken for the round trip is 6 hours, find the distance between the two cities.
    A 120 km Correct Answer Incorrect Answer
    B 100 km Correct Answer Incorrect Answer
    C 144 km Correct Answer Incorrect Answer
    D 90 km Correct Answer Incorrect Answer

    Solution

    Let the distance between the two cities be D km. Time taken to travel from A to B = D / 60 Time taken to travel from B to A = D / 40 Total time = D/60 + D/40 = 6 hours Finding a common denominator: (2D + 3D) / 120 = 6 5D = 720 D = 720 / 5 = 144 km Correct answer: c

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