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    Question

    Car β€˜M’ can cross a 480 metre long bridge in 16

    seconds. Car β€˜M’ is 128 metres ahead of car β€˜N’ which is travelling in the same direction as that of car β€˜M’ with a speed of 38 m/s. After how many seconds will car β€˜N’ meet car β€˜M’?
    A 18 seconds Correct Answer Incorrect Answer
    B 14 seconds Correct Answer Incorrect Answer
    C 12 seconds Correct Answer Incorrect Answer
    D 16 seconds Correct Answer Incorrect Answer

    Solution

    Speed of car β€˜M’ = 480 Γ· 16 = 30 m/s So, relative speed of car β€˜N’ with respect to car β€˜M’ = 38 – 30 = 8 m/s Distance between the two cars = 128 metres So, time taken by car β€˜N’ to meet car β€˜M’ = 128 Γ· 8 = 16 seconds

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