A jar contains 100cm² of mixture of oil and water in the ratio 1:4. Enough oil is added to make the ratio of oil to water 1:2. How much water must be added to make the ratio of oil to water 1:3?

Question

akashdeepdeb · Answer

FIRST: 100cm^2 is first in the ratio of oil to water as 1:4
This means that now water is more.

SECOND: 100cm^2 ratio is 1:2
Still water is more 
1:2 means that 100is divided into 3 parts first and then 1 part goes to oil and 2 parts go to water.

So 33cm2 --> Oil and 66cm2 ---> water

THIRD:
wE hAVE to make it 1:3
1 part to oil
3 parts to water

So 1/4 * 100 = 25cm^2 to oil
3/4 * 100 = 75cm2 to water.

Now they are asking, HOW MUCH water is added?

The answer would be: Original amount - Previous amount = 75-66 = 9cm2 is added to water to make the ratio 1:3

Understood? :)

anonymous · Answer

OOOHHHHH okayies! :D Oh my gosh thank you soooo much :D You made it so clear! ^^ Thank you thank you! :) I understand perfectly! ;D Thank you very much! ^^

akashdeepdeb · Answer

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