Amit can complete a piece of work in 2.25 days. Badri takes double the time taken by Amit. Chetan takes double that of Badri, and Das takes double that of Chetan to complete the same task. They are split into two groups (of one or more persons) such that the difference between the times taken by the two groups (of one or more persons) such that the difference between the times taken by the two groups to complete the same work is minimum. What could be the composition of the faster group?

A. Amit and Das

B. Badri and Chetan

C. Badri, Chetan and Das

D. Amit alone

• c.badri,chetan and das
• 9 years agoHelpfull: Yes(0) No(0)
• ans: Amit and Das
  Let, A be the efficiency of Amit then acording to question, 2A will be Badri's , 4A will be chetan's and 8A will be das's.
  Nowcheck through options.
• 9 years agoHelpfull: Yes(0) No(0)
• Ans c
  A=2.25 days
  B= 4.5 days
  C=9 days
  D=18 days
  Now one days work of B ,C,D=1/4.5+1/9+1/18=7/18
  So they will cmplt the work in 18/7 I.e 2.59 days
  Now2.59-2.25 will give u minimum value out of all possible combination
• 9 years agoHelpfull: Yes(0) No(0)
• Badri, Chetan and Das can do the work in 4.5 , 9 and 18 days
  
  They together can perform the work in 1/(2/9+1/9+1/18)
  
  = 18/7 days i.e 2.57
  
  Amit alone can do the job in 2.25 days. So this is the minimum difference between any
  
  two combinations.
  Ans is amit alone
• 8 years agoHelpfull: Yes(0) No(0)