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    Question

    There was a race of 2480 meters between P & Q on a

    circular track of 620 meters. First time they meet during the race after 4 minutes of starting of race. Find the time taken by Q to complete the race, if he runs at half the speed of P.
    A 16 Correct Answer Incorrect Answer
    B 18 Correct Answer Incorrect Answer
    C 36 Correct Answer Incorrect Answer
    D 24 Correct Answer Incorrect Answer

    Solution

    Let speed of P is 2x and speed of Q is x. According to question, 620/(2x−x) = 4 min ⇒ 2x – x = 155 meters/min ⇒ x = 155 meters/min Therefore the speed of Q is 155 meters/min.  Time taken by Q = 2480/155 = 16 minutes

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