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03 Aug 2019, 09:16
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Difficulty:
55%
(hard)
Question Stats:
78% (01:51) correct
22%
(00:59)
wrong
based on 9
sessions
History
Date
Time
Result
Not Attempted Yet
A vessel is full of a mixture of milk and water, with 9% milk. Nine litres are withdrawn and then replaced with pure water. If the milk is now 6%, how much
does the vessel hold?
(A) 27 litres
(B) 18 litres
(C) 36 litres
(D) 40 litres
does the vessel hold?
(A) 27 litres
(B) 18 litres
(C) 36 litres
(D) 40 litres
gmatchile
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03 Aug 2019, 15:57
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Initial liters X, 9 liters are extracted, there are (X-9) liters, quantity of milk there, (X-9) (9/100).
That amount of milk does not change, if the total volume changes, it increases by 9 liters, so we have a solution of X liters to 6% of milk.
Then the amount of milk has not increased or decreased is the same.
So we have to,
(X-9) (9/100) = X (6/100)
X (9/100) - 9 (9/100) = X (6/100)
X (9/100 -6/100) = 9 (9/100)
X (3/100) = 81/100
X = 27 LTS
Answer A
https://www.gmatchile.cl
That amount of milk does not change, if the total volume changes, it increases by 9 liters, so we have a solution of X liters to 6% of milk.
Then the amount of milk has not increased or decreased is the same.
So we have to,
(X-9) (9/100) = X (6/100)
X (9/100) - 9 (9/100) = X (6/100)
X (9/100 -6/100) = 9 (9/100)
X (3/100) = 81/100
X = 27 LTS
Answer A
https://www.gmatchile.cl
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