Multiple Choice Questions on Two trains A and B start running together from the same point in the same direction at the speed of ........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

Two trains A and B start running together from the same point in the same direction at the speed of ...........

Quantitative Aptitude ( CCS) Time & distance
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    Two trains A and B start running together from the same point in the same direction, at the speed of 60 kmph and 72 kmph respectively. If the length of both the trains is 240 metres, how long will it take for train B to cross train A?

    2 min 12 sec

    Incorrect Answer

    1 min 24 sec

    Incorrect Answer

    1 min 12 sec

    Incorrect Answer

    2 min 24 sec

    Correct Answer
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    Explanation:

    Relative speed =(72 -60)kmph 

    = 12kmph = (12 x 5/18)m/sec = 10/3 m/sec 
    Total distance covered =(240 +240)m =480m 
    Required time =(480 x 3/10)sec = 144sec = 2min 24 sec.
    Hence, option 4 is the correct answer.

    By: Amit Kumar
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