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    Question

    Bike ‘A’ is 150 metres ahead of bike ‘B’. Bike

    ‘A’ is travelling at 16 m/s and bike ‘B’ is travelling at 54 km/h. If both bikes are moving in the same direction, how long will bike ‘B’ take to overtake bike ‘A’?
    A 65 secs Correct Answer Incorrect Answer
    B 42 secs Correct Answer Incorrect Answer
    C 30 secs Correct Answer Incorrect Answer
    D Can't be determined Correct Answer Incorrect Answer

    Solution

    Speed of bike ‘B’ = 54 ÷ 3.6 = 15 m/s
    So, relative speed of bike ‘B’ with respect to bike ‘A’ = 15 – 16 = –1 m/s
    Since the relative speed is negative, bike ‘B’ will never overtake bike ‘A’.

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