45 litres of a mixture of of milk and water contains 15% water. How much water must be added so as to make water 25% in the resultant mixture?
A. 10 litres
B. 6 litres
C. 4.5 litres
D. 9 litres
A. 10 litres
B. 6 litres
C. 4.5 litres
D. 9 litres
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