if 30 men completes a job in 15 days working 9 hrs per day.. how much hours per day should 40 men work ??

2 Answers on this Question

1. as i assume the time taken to complete the job is not to be
   changed while increasing the employees as it does not
   clearly states so……….
   30 men wrk for 9 hrs
   therefore for the work to be done if no of workers is
   increases the no of hrs / day to work should decrease so
   here s a inverse relation
   solving further we get
   30 = K /9 ==> K= 270
   now
   40 = 270/y ==> y= 6.75
   therefore ans is d)none

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2. convert days in hours so 15*9=135 hours
   30 men complete a job in = 135 hours
   time for 1 man to complete the same job = 135*30
   time for 40 men to do the same job = 135*30/40
   so the answer will be 6.75 that is (d) none

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