Question

A mixture of milk and water measures 60 gallons is it contains 20% water how many gallons of water should be added to it so that water maybe 25%

Answer 1

Answer:

4 gallons

Step-by-step explanation:

Let x be amount of water to be added.

Volume of milk in original mixture with 20% water = 60 * 80/100 = 48 gallons

Now to decrease the milk from 80% to 75%, the volume of water to be added can be calculated as

60*0.8 = (60+x)0.75

=> 48 = 45 + 0.75x

=> x = 3/0.75 = 300/75 = 4 gallons.