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easy one

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Master | Next Rank: 500 Posts
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easy one

by magical cook » Mon Jan 28, 2008 9:43 am
How many liters of an acid solution with no salt content should be mixed with 35 liters of a saline solution with 40% salt content to yield a 32% saline solution?

(A) 4.12
(B) 8.75
(C) 18
(D) 35
(E) 43.75
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Junior | Next Rank: 30 Posts
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by roy_priya » Mon Jan 28, 2008 3:09 pm
35 L has a saline concentration of 40%. To get to a concentration of 32% it has to be diluted to 43.75 L (inverse relationship).

So 8.75L needs to be added.

Answer is B
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by magical cook » Mon Jan 28, 2008 3:35 pm
thanks - no OA but I got the same answer.
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