Question

A mixture of lime and water contains 3a liters lime and (a + 40) liters water. Upon adding 20 liters more water, the ratio of quantity of water to that of lime in the mixture becomes 2:3. How much water should be added in the resultant mixture to further decrease the % of quantity of lime in the mixture to 50%?

A 56 liters
B 70 liters
C 60 liters
D 45 liters
E none of these
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