Question

There are 20 litres of a 65% alcoholic drink. How many litres of a 77% solution of alcohol must be added to obtain a 68% alcoholic drink?

Answer 1

Okay so first find amount of alcohol in 20 litres. Can you do that?

Answer 2

13 liters alochol and 7 litres

Answer 3

why u deleted that

Answer 4

@douglaswinslowcooper

Answer 5

Now next we can assume we are adding 100 litre of solution containing alcohol 77 litre alohol.

Answer 6

I gave too much of the answer and was warned not to do that, so it was deleted.

Answer 7

This means the net alcohol amount is now

13+77= Total amount of alcohol
7+23=part of solution not containing alcohol

Answer 8

100,30

Answer 9

Or wait...It would be better we bring variable initially itself.

13+(77/100)x=Net alcohol content

Now this alcohol content should account for 68%

13+(77/100)x
------------ x 100=68
20+x

Answer 10

Solve for x

Answer 11

x=6.7

Answer 12

Good work!!

Answer 13

i have another question

Answer 14

Sure post it separately. The other reply was deleted as we are not permitted to post direct answers in this site like yahoo answers.

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