Get detailed explanations to advanced GMAT questions.

If Henry were to add 5 gallons of water to a tank that is already 3/4 full of water, the tank would be 7/8 full. How many gallons of water would the tank hold if it were full?

Option A:

25

Option B:

40

Option C:

64

Option D:

80

Option E:

96

Option B is the correct answer.

Let “x” be the total capacity of the tank

Given, (¾)x + 5 = (7/8)x

Solving it we get X = 40

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