18) A vessel contains a mixture of two liquids A & B in the ratio 4:1 . when 10liters of the mixture is replaced with liquid B, the ration becomes 2:3. How many liters of liquid A was present in the jar initially?
A) 12 liters
B) 14 liters
C) 16 liters
D) 10 liters

• ANSWER : 16 litres
  
  SOLUTION :
  
  Let total solution be x.
  At first solution contain A = 0.8x & B = 0.2x
  10 litre replacement means we remove 8 litre A and 2 litre B with 10 litres of B
  So equation is
  
  (0.8x-8)/(0.2x+8) = 2/3
  Or, x = 20
  so 20 litre solution contain 16 litre A and 4 litre B.
• 13 years agoHelpfull: Yes(5) No(3)
• eqution is 4x(3x+10)=2x*x
  thus solution is 16 ltrs i.e c part
• 13 years agoHelpfull: Yes(4) No(4)