A can do a work in 36 days, B can do the work in 72 days and C can do the work in 78 days.
The three take turns in working, i.e. A works on the first day, B works on the second day, C on the third day and so on.
Which day will they finish the work?

55 th day
19 th day
54 th day
17 th day

• total work done in 3 day = 1/36+1/72+1/78=153/2808
  so number of 3 days payer require to finish the work=2808/153=18.35
  work done in 54 days=153*18/2808=2754/2808
  work left after 54 days= 1-2754/2808=54/2808=1/52
  s0 1/25 part of work can be finish by A on 55th day
  
• 13 years agoHelpfull: Yes(10) No(4)
• 55 day is the answerrrrrrrrrrrrrrrrrrrrr
• 13 years agoHelpfull: Yes(3) No(4)