55 men can finish a job in 42 days. if the work has to be completed 9 days earlier, how many additional men must be engaged to complete the work

• 55*42 proportional to 1 job.
  x*(42-9) proportional to 1 job.
  taking ratio .x=70.
  hence extra men engaged = 70-55=15.
• 11 years agoHelpfull: Yes(18) No(0)
• Use M1*d1*h1/w1= M2*d2*h2/w2 formula
  
  Here we have oly men and days so apply to formula
  
  The work has to be completed in 9days before that means work has completed in 33 days
  
  55*42=(55+x)*33
  x=15
• 11 years agoHelpfull: Yes(8) No(0)
• 55*42=x*33
  =>x=(55*42)/33
  =70
  additional men require=70-55
  =15
• 11 years agoHelpfull: Yes(4) No(0)
• 15 more men will be required
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• please explain the solution
• 11 years agoHelpfull: Yes(0) No(0)
• 55*42=x*33
• 11 years agoHelpfull: Yes(0) No(3)
• 15 is correct
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• no. of days is inversly propotional to no. of men .
  and as no. of day decreased(42-9=33) so no. of men will increase, so the fraction would be 33/42.
  now.... let total x men reqd to complete the work.
  x/55=1/(33/42)
  x=(42/33)*55=70
  so additional men reqd=70-55=15
  
• 9 years agoHelpfull: Yes(0) No(1)