if 10 mens can do a work in 15 days.then how long will it take for 30 mens

Let the time taken by 30 men to complete the work = x daysNow, it is given that 10 men can complete the work in 15 days.Since, number of days varies inversely with number of men.Now, 30 × x = 10 × 1530x = 150x = 15030 = 5So, time taken by 30 men to complete the work = 5 days

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45 days
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It takes 5 days for 30 men to do the same work.
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This question can be solved with the help of "DIRECT & INVERSE PROPORTION"

             

                NO. of men                                              NO.of days

                       10                                                             15
                       30                                                              x
   
        Since 10 men can do a work in 15 days,
        Then the same work could be finished by 30 men in less than 15 days.

  Hence we will apply INVERSE PROPORTION in this case-

  x/15= 10/30
  x=1*15/3
  x=5 days

Hence the answer is 5 days.


  Hope you got it!!!!
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Ananya is ryt
  • 2
5 days
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