A mixture of 40 liters of milk and water contains 10% water. How much water must be added to make 20% water in the new mixture?
3 liters
4 litres
5 litres
6 litres
A
3 liters
B
4 litres
C
6 litres
D
5 litres
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Solution
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10% of water is present in 40 liters of milk
Hence milk →36l and water →4l
4+x40+x=15 (20% =15)
20+5x=40+x
4x=20
x=5
5 litres of water must be added
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