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Two water tanks, X and Y ---

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Two water tanks, X and Y ---

by RoadtoIVY » Sun Nov 22, 2009 8:12 pm
Two water tanks, X and Y, were drained simultaneously. If X contained 30 more gallons of water than Y, and both tanks became empty at the same time, how long did it take the tanks to empty?

(1) For every gallon drained from tank Y, 2 gallons were drained from tank X.
(2)Tank Y was drained at a constant rate of 20 gallons per hour.
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by ershovici » Mon Nov 23, 2009 1:19 am
IMO should be C

since we have Y=X-30, both tanks become empty at the same time, and drained speed for Y=2X, we can conclude that: tank X have twice tha capacity of tank Y: X=2Y and X=Y+30 gives result X=60, Y=30.
Statement 2 - 30g/20g/h=1.5 hour
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by RoadtoIVY » Mon Nov 23, 2009 9:00 am
I will also go wth C.
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