A 40 litre of mixture of milk and water contain 10% water then how much water must be added to make the concentration of water 20%....................plz give me the answer as soon as possible .

A 40 litre of mixture of milk and water contain 10% water then how muc

1.	A 40 litre of mixture of milk and water contain 10% water then how much water must be added to make the concentration of water 20%....................plz give me the answer as soon as possible .
Answer» 10 percent of 40 is 4 lites of WATER now $\frac{20}{100} \times (40 + x) = 4 + x \\ 40 + x = 20 + 5x \\ x = 5 \\$ 5 LITRES of water more should be added

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A 40 litre of mixture of milk and water contain 10% water then how much water must be added to make the concentration of water 20%....................plz give me the answer as soon as possible .

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