SOLUTION: A mixture of 40 litres of milk and water contains 10% water.How muah water must be added to make 20% in the new mixture?

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Question 332483: A mixture of 40 litres of milk and water contains 10% water.How muah water must be added to make 20% in the new mixture?
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
10% of 40L is 4L of water

adding w liters , the new mixture is ___ (4 + w) / (40 + w) = 20%

4 + w = 8 + .2w

.8w = 4 ___ w = 5

you will have 9L of water in 45L of mixture , 20%