A takes twice as much time as B or thrice as much time to finish a piece of work. Working together, they can finish the work in 2 days, can do the work alone in
A. 4 days B. 6 days
C. 12 days D. 15 days

• Let A,B,C takes time x,x/2,x/3
  Then work
  1/x+2/x+3/x=1/2
  6/x=1/2
  x=12
  A takes 12 hr.B takes 6 hr.C takes 4 hr.
  
• 11 years agoHelpfull: Yes(18) No(2)
• 12 days.
  
  4 + 6 + 12 + 15 = 37/3 = 12,3
• 12 years agoHelpfull: Yes(3) No(10)
• 
  Suppose A, B and C take x, x and x days respectively to finish the work.
  2 3
  Then, 1 + 2 + 3 = 1
  x x x 2
  6 = 1
  x 2
  x = 12.
  
  So, B takes (12/2) = 6 days to finish the wor
• 12 years agoHelpfull: Yes(3) No(7)
• A takes max twice time=2/X,
  B takes max time =3/X,
  c will takes max time =1/X,
  A,B,C both the together will takes time(2/X+3/X+1/X=2) (both the A,B,C finish work 2 days)
  so ans:
  (2/x+3/x+1/x)=2days
  6/x=2days =>X=2*6=12days
  
• 7 years agoHelpfull: Yes(1) No(1)
• Actual question is here and answer also
  
  
  A takes twice as much time as B or thrice as much time as C to finish a piece of work. Working together, they can finish the work in 2 days. B can do the work alone in:
  A. 4 days
  B. 6 days
  C. 8 days
  D. 12 days
  Answer: Option B
  
  
• 7 years agoHelpfull: Yes(1) No(4)