Multiple Choice Questions on Two guns were fired from the same place at an interval of 13 minutes but a person travelling in a tr........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

Two guns were fired from the same place at an interval of 13 minutes but a person travelling in a tr...........

Quantitative Aptitude ( CCS) Time & distance
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    Two guns were fired from the same place at an interval of 13 minutes but a person travelling in a train approaching the place hear the second sound after 12 minutes than the first. Find the speed of the train. Consider sound travels at a speed of 330 meter per sec.

     

    33km/hr
     

    Incorrect Answer

    66km/hr
     

    Incorrect Answer

    99km/hr
     

    Correct Answer

    120km/hr

    Incorrect Answer
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    Explanation:

    Sound travels at 330m/sec. In one minute sound travel = 330*60 meter.
    So speed of train = (330*60)/720 = 330/12 m/sec or 330/12 of 18/5 = 99 km/hr

    By: Sandeep Dubey
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