SOLUTION: Here is a question: At an Italian restaurant there is a jug of heterogeneous oils that are composed of 20 liters of 93% oil type and 10 liters of pure neutral liquid. Now, the 93

Question 68280: Here is a question:
At an Italian restaurant there is a jug of heterogeneous oils that are composed of 20 liters of 93% oil type and 10 liters of pure neutral liquid.
Now, the 93% oils are on the bottom while the neutral liquid is less dense. How much of the oils must I take out of the bottom, so that when I shake the jug up, I get a heterogeneous solution of 64%?
Answer by Nate(3500) (Show Source): You can put this solution on YOUR website!
First, let us find the solution's percentage of oil content:
(20(93%) + 10(0%))/(30) = ?
(20(0.93) + 10(0.00))/30 = ?
18.6/30 = 0.62 or 62%
On the contrary, you would have to add oils to get a solution of 64% ....
(18.6 + x(0.93))/(30 + x) = 0.64
18.6 + 0.93x = 19.2 + 0.64x
0.29x = 0.6
x = about 2.1 liters of 93% oils must be added
RELATED QUESTIONS
A jug contains 16 liters of lemonade. How many 320 milliliter servings are in one... (answered by Theo)

A water jug with a capacity of 20 gallons is 20 percent full. At the end of every third... (answered by greenestamps)

you pour 200ml of water into a litre jug. what percentage of the jug is... (answered by wilft1)

A jug contains some orange juice. After pouring 240 milliliters of the orange juice into... (answered by macston)

a solution containing 12.5 liters is composed of water and acid in the ratio 3:2. how... (answered by josgarithmetic)

a litre of water is poured into a cyliner glass jug. if the water in the jug is 8cm deep, (answered by ikleyn)

Two coffee jugs, A and B are filled as shown below. Jug A:5 cups of water, 5 teaspoons... (answered by addingup)

A researcher is investigating which of the two newly developed automobile engine oil is... (answered by robertb)

22 customers are eating dinner at an Italian restaurant. Of the 22 customers, 18 order... (answered by ikleyn)