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How many liters of a solution that 15% salt must be added to

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Director
Joined: 12 Jun 2006
Posts: 532

Kudos [?]: 157 [0], given: 1

How many liters of a solution that 15% salt must be added to [#permalink]

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13 Mar 2007, 19:49
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

How many liters of a solution that 15% salt must be added to 5 liters of a solution that 8% salt so that the resulting mixture is 10% salt?

15/100(L) + 8/100(5) = 10/100(L)

This is how I solved. Obviously, it's wrong. Can anyone explain why?

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Manager
Joined: 15 Nov 2006
Posts: 217

Kudos [?]: 72 [0], given: 0

Location: Ohio

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13 Mar 2007, 20:12
It should be:

15/100(L) + 8/100(5) = 10/100(5+L) because the resulting solution volume would be 5 +L.

Solving for L, you will get 2litres of solution need to be added.

thanks!

Nitin

Kudos [?]: 72 [0], given: 0

13 Mar 2007, 20:12
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