if A and B both work for 6 hrs,B and C work for 7.5 hrs,C and A work for 10 hrs .
i dont remember but ......its arrange in increasing order by their work

a)cab
b)cba
c)abc
d)none of these

• A and B both can finish the work in 6 days means
  1/A+1/B=1/6 ................(i)
  B and C both can finish the work in 7.5 days means
  1/B+1/C=1/7.5 ...................(ii)
  C and A both can finish the work in 10 days means
  1/A+1/B=1/10 ........................(iii)
  Adding (i),(ii) and (iii), we get
  2(1/A+1/B+1/C)=2/5 ......................(iv)
  from (i) we have 1/A+1/B=1/6 put in (iv) ,we wiil get
  1/6+1/C=1/5
  C=30
  Similarly, we will get A=15 and B=10
  so in increasing order it will be BAC
• 8 years agoHelpfull: Yes(36) No(7)
• Answer is D as it was asked arrange in increasing order of time taken so maximum time taken was by c
  then a and then b so answer should have been bac
• 8 years agoHelpfull: Yes(15) No(4)
• Cab is the answer
• 8 years agoHelpfull: Yes(2) No(3)
• d)none of these
• 8 years agoHelpfull: Yes(1) No(2)
• BAC is there in options
  
• 8 years agoHelpfull: Yes(1) No(0)
• how come himaan is best solution
  gaurav singh solved it with proper explanation
  
• 8 years agoHelpfull: Yes(1) No(0)
• a+b=6....(1); b+c=7.5....(2); c+a=10....(3);
  so,2(a+b+c)=23.5; a+b+c=11.75.....(4);
  equation 4-1,we get c=5.75; equation 4-2,we get a=4.25; equation 4-3,we get b=1.75
  so,arrange in increasing order by their work is bac
• 7 years agoHelpfull: Yes(1) No(1)
• quetion is to arrange in incresing order by work , not by time they taken.
  So the work of b is more than a and work of a is more than c.
  so ans should be a) cab
• 7 years agoHelpfull: Yes(1) No(0)
• ans is cab
• 7 years agoHelpfull: Yes(0) No(1)
• ans-> none of this
  BAC is the correct order
• 6 years agoHelpfull: Yes(0) No(0)