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?
Choose the correct answer:
A) 30	B) 40	C) 50	D) 60	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   Short cut method:   milk:water = 5 :2   after adding 10 liters of water   milk:water = 5 :3   milk is same but water increse 10liters then the water ratio is increse 1 parts   1 part -----&gt; 10 liters   The quantity of milk in the original mixture is = 5 : 2 = 5 + 2= 
<gadget id="calculator">5 + 2</gadget>
<output>7</output>
7   7 parts -----&gt; 70 liters (Answer is= 70)   Short cut method - 2 : for Only milk problems   milk : water   5 : 2   5 : 3   milk ratio same but water ratio 1 part incress per 10 liters   1 part of ratio -------&gt; 10 liters   7 part of ratio -------&gt; 70 liters   50)
<result>C</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?