A mixture contains milk and water in the ratio 5:2. On adding 10 liters of water, the ratio of milk to water becomes 5:3. The quantity of milk in the original mixture is?	Pick.
A) 40 B) 48 C) 52 D) 56 E) 70
milk:water = 5:2   5x : 2x + 10 = 5 : 3   3[5x] = 5[2x + 10]   15x = 10x + 50   15x - 10x = 50   x = 10   The quantity of milk in the original mixture is = 5 : 2 = 5 + 2= 
<gadget id="calculator">5 + 2</gadget>
<output>7</output>
7   7x= 70   70
<result>E</result>
A mixture contains milk and water in the ratio 5:2. On adding 10 liters of water, the ratio of milk to water becomes 5:3. The quantity of milk in the original mixture is?