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a. Prelims Paper (GS) Paper – 2

(CSAT Q10002) (UPSC 2014) (Time, Distance, Work) Five person fire bullets

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  • November 24, 2014 at 4:50 pm #3596
    Wonder Boy
    Participant

      Q. 10002 : Five persons fire bullets at a target at an interval of 6,7,8,9 and 12 seconds respectively. The number of times they would fire the bullets together at the target in an hour is

      (a)   6

      (b)   7

      (c)   8

      (d)  9

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      solution will be provided in (CSAT Q 10003)

      March 1, 2015 at 7:38 pm #4894
      Srivastava

        8 times

        March 2, 2015 at 6:30 pm #4900
        Pratik Shinde
          1. LCM of given numbers 504 sec i.e. 8.4 mins.
          2. So in 1 hr with time period 8.4 min it will repeat 7 times.
          3. Ans 7
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