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Question
A 180 liter mixture of milk and water contains 20% water. How much milk, in liters, must be added to the mixture so that the new mixture will contain water and milk in the ratio of 1 : 7?
100 liters
108 liters
144 liters
252 liters
None of them
ANSWER : 2
Descrption
<p>Amount of water = 20/100 ×180 = 36 liter</p> <p>Amount of milk = 80 /100 ×180 = 144 liter</p> <p>Let, amount of milk to be added is x</p> <p>36/(144 + x) = 1/7</p> <p>144 + x = 252 </p> <p>x = 108</p>
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