If 9 men working 71/2 hours a day can finish a piece of work in 20days, then how many days will be taken by 12 men, working 6 hours a day to finish the work? It is being given that 2 men of latter type work as much as 3 men of the former type?

• ANS 12(1/2)DAY=12.5 DAY
  
  (9/X)=(1/(20*15/2))=>1/X=(1/1350)
  
  3 OLD MEN= 2 NEW MEN
  NEW 1/X=(3/2)*(1/1350)=(1/900)
  12/X=1/(Y*6)
  =>1/X=1/(12*6*Y)
  =>1/900=1/(12*6*Y)
  Y=12.5 DAY
  
• 10 years agoHelpfull: Yes(1) No(4)
• (9men*15/2*20) / (12*6*y)=75/4y
  3 old men=2 new men
  1/x=3/2 y
  1/x=3/2(4/75)
  1/x=12/150
  x=150/12
  x=12 1/2 days
  
  
• 9 years agoHelpfull: Yes(0) No(2)