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  • Question
  • If a Siren sounds for every 5 seconds, how many times will it sound in ¾ of an hour?


  • Options
  • A. 541 times
  • B. 540 times
  • C. 450 times
  • D. 275 times

  • Correct Answer
  • 541 times 

    Explanation

    There are 60 minutes in an hour.

    In ¾ of an hour there are (60 × ¾) minutes = 45 minutes.

    In ¾ of an hour there are (60 × 45) seconds = 2700 seconds.

    Siren sounds for every 5 seconds.

    In 2700 seconds = 2700/5 = 540 times.

    The count start after the first sound, the Siren will sound 541 times in ¾ of an hour.

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