After the addition of 35 liters of water to a can of diluted milk, the concentration of milk in the can becomes 30%. Now, further 40 liters of water is added to the can and the concentration of milk in the can gets reduced by 10 percentage points. How many more liters of water must be added to the can now such that the concentration of milk in the can becomes 8%?

• Let x be amount of milk,
  y be the amt of water in initial stage.
  When 35 ltrs of water is added,
  x/(x+y+35)=3/10
  when additional 40 litres of water is added
  x/(x+y+75)=1/5
  solving these equations,
  we get
  x=24 and y=21
  let w be more water added
  then, 24/(21+24+35+40+w)=8/100
  by solving
  we get
  w=180 ltrs
• 11 years agoHelpfull: Yes(7) No(0)
• 180 litres of water must be added.
• 11 years agoHelpfull: Yes(3) No(1)