X is thrice as good as workman as Y and therefore is able to finish a job in 60 days less than Y. Working together, they can do it in..

• Ratio of time taken by X:Y is X:3X [ if X finished in 1 day, Y takes 3 days]
  
  X completes 60 days less than Y
  
  X=3X-60
  X=30
  
  So X completes the work in 30 days
  Y ll complete in Y=3X ==> Y=3(30)====> Y=90days
  
  X+Y's 1 day work ----> 1/30+1/90
  = 90+30/2700 ===>120/2700 ====>12/270 ---->4/90==2/45
  
  Together they ll complete in
  
  45/2 days ===> 22 1/2 days
• 10 years agoHelpfull: Yes(17) No(0)
• 22 1/2 days
  If X & y can do the work in 'x' & 'y' days respectively
  y-x=60 ---(i) & y=3x ---(ii)
  Solving x=30,y=90
  Days to finish the work together=1/[(1/30)+(1/90)]=90/4=22.5
• 10 years agoHelpfull: Yes(3) No(0)
• 22 2/4 days
  ratio of no of days requied to complete the work
  X : Y = 1:3
  
  Let X takes x days and Y takes 3x days
  3x-x = 2x = 60days
  x=30
  
  therefore X takes 30 days and Y takes 90 days
  together they take
  (30*90)/(30+90) = 90/4days
  = 22 2/4days
• 10 years agoHelpfull: Yes(2) No(0)
• y=3x....(i)
  y-x=60...(ii)
  
  From above equatioons, we get
  x=30
  y=90
  
  Togather they finished=2/45 of total work per day.
  
  Finished the work by 45/2days=22 and 1/2 days.
  
• 10 years agoHelpfull: Yes(0) No(0)