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    Question

    The speeds of 'Pawan' and 'Qureshi' are in the ratio of

    8:5. If the total time they take to individually cover 400 km each sums up to 65 hours, what is the difference in the time taken by them to travel the same distance?
    A 30 hrs Correct Answer Incorrect Answer
    B 55 hrs Correct Answer Incorrect Answer
    C 15 hrs Correct Answer Incorrect Answer
    D 18 hrs Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ, Let the speeds of тАШPawanтАЩ and тАШQureshiтАЩ be 8x km/hr and 5x km/hr, respectively ATQ, (400/8x) + (400/5x) = 65 Or, 65x = 50 + 80 Or, 65x = 130 Or, x = 2 Therefore, speed of тАШPawanтАЩ = 8x = 16 km/hr Speed of тАШQureshiтАЩ = 5x = 10 km/hr Required difference = (400/10) тАУ (400/16) = 40 тАУ 25 = 15 hours

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