amit can complete the work in 2.25 days ,and b can complete it in 4.5 days,c can complete in 9 days while d can complete in it 18 days,they are split into two groups such that the differnce between the time taken by the two grp is min,what will be the composition of faster grp?
1.a 2.a,d 3.b,c 4.b,c,d

• 1.a
  one day work of ABCD is 4/9, 2/9, 1/9 , 1/18
  one day work of B,C,D is 2/9 +1/9 +1/18 = 7/18
  where as A's one day work is 8/18.
  
  so Difference between time taken is minimum when A works alone and BCD are in one group.
  So A is faster than BCD combined.
• 13 years agoHelpfull: Yes(8) No(4)