GMAT Practice Question Set #18 (Question 52-54)

Data Sufficiency Question #52: Pumping A Large Container  
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S and T are two water pumps that run at constant rates. If pump T pumped alone, how many more hours would it take for it to finish pumping a large container than it would take for pump S to accomplish the same task by itself?

(1) When both the water pumps work together, they finish pumping a large container in `2/3` rd the time it takes for pump S to finish the task alone.

(2) Pump T is capable of pumping a large container in twice the time that it takes pump S to accomplish the same task alone.

(A)

Statement 1 alone is sufficient but statement 2 alone is not sufficient to answer the question asked.

(B)

Statement 2 alone is sufficient but statement 1 alone is not sufficient to answer the question asked.

(C)

Both statements 1 and 2 together are sufficient to answer the question but neither statement is sufficient alone.

(D)

Each statement alone is sufficient to answer the question.

(E)

Statements 1 and 2 are not sufficient to answer the question asked and additional data is needed to answer the statements.

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