in a mixture of 45 litres the ratio of milk to water is 4: 1. additional 12 litres of water is added to the mixture. find the ratio of milk to water in the resulting mixture.	Select the correct option.
A) 12 / 7	B) 4 / 1	C) 2 / 3	D) 3 / 4	E) 3 / 2
<gadget id="calculator">4 + 1</gadget>
<output>5</output>

<gadget id="calculator">45 / 5</gadget>
<output>9</output>

<gadget id="calculator">45 - 9</gadget>
<output>36</output>

<gadget id="calculator">9 + 12</gadget>
<output>21</output>

<gadget id="calculator">36 / 21</gadget>
<output>12/7 = around 1.714286</output>

<result>A</result>
in a mixture of 45 litres the ratio of milk to water is 4: 1. additional 12 litres of water is added to the mixture. find the ratio of milk to water in the resulting mixture.
divide(subtract(45, divide(45, add(4, 1))), add(divide(45, add(4, 1)), 12))
"given that milk / water = 4 x / x and 4 x + x = 45 - - > x = 9 . thus milk = 4 x = 36 liters and water = x = 9 liters . new ratio = 36 / ( 9 + 12 ) = 36 / 21 = 12 / 7 . answer : a ."