GMAT Practice Question Set #23 (Question 67-69)

Data Sufficiency Question #69: Distance and Rates  
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Peter can drive to work via the expressway or via the city roads, which is a less delay-prone route to work. What is the difference in the time Peter would spend driving to work via the expressway versus the city roads?

(1) Peter always drives 60mph, regardless of which route he takes; it takes Peter an hour to drive round-trip to and from work using the city roads

(2) If Peter travels to and from work on the expressway, he spends a total of 2/3 of an hour traveling
(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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