A shopkeeper sells milk which contains 5% water. What quantity of pure milk should be added to 2 liters of milk (containing 5% water) so that proportion of water becomes 4%?

• 0.5 ltr
  
  In 2 ltr mixture of milk containing 5% water, quantity of water is 2*5/100= 0.1 ltr.
  
  Now this 0.1 ltr of water is 4% of a mixture of 0.1*100/4 = 2.5 ltr.
  
  so 2.5-2.0 = 0.5 ltr of pure milk is to be added to 2 liters of milk (containing 5% water) so that proportion of water becomes 4%.
• 12 years agoHelpfull: Yes(29) No(4)
• Present proportion of milk and water(in 2 litres of milk) is : 1900:100( in ml)
  Now, let the milk should be added x ml
  So, the new ratios is (1900+x):100
  Hence, the equation becomes 100/(2000+x)=4/100
  x comes to 500ml
  Therefore, 500 ml of milk should be added so that the proportion of water become s 4%
• 12 years agoHelpfull: Yes(13) No(3)
• using formula, required quantity of pure milk
  
  =
  Initial total Quantity (Initial concentration percentage - Final concentration percentage)
  Final concentration percentage
  =Initial total Quantity (Initial concentration percentage - Final concentration percentage)/Final concentration percentage
  =2(5-4)/4= 0.5L
• 7 years agoHelpfull: Yes(2) No(0)
• 5% in 2lt of milk is 0.1
  0.1/(2+x)=4%
  4x+8=10
  x=0.5
  so,ans is 0.5 ..:)simple
• 7 years agoHelpfull: Yes(1) No(0)
• 5%*(2000ml) =4%(2000ml+x)
  0.05(2000ml)=0.04(2000+x)
  solve this u will get answer 500ml
• 8 years agoHelpfull: Yes(0) No(2)