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    Question

    Car ‘C’ is 200 metres ahead of car ‘D’. Car

    ‘C’ is moving at 25 m/s and car ‘D’ is moving at 108 km/h. How much time will car ‘D’ take to overtake car ‘C’?
    A 65 secs Correct Answer Incorrect Answer
    B 40 secs Correct Answer Incorrect Answer
    C 30 secs Correct Answer Incorrect Answer
    D Can't be determined Correct Answer Incorrect Answer

    Solution

    Speed of car ‘D’ = 108 ÷ 3.6 = 30 m/s
    So, relative speed of car ‘D’ with respect to car ‘C’ = 30 – 25 = 5 m/s
    So, time taken by car ‘D’ to overtake car ‘C’ = 200 ÷ 5 = 40 seconds

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