Official Guide Explanation:
Data Sufficiency #103

Background

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Solution and Metadata

Question: 103
Page: 281
Difficulty: 5 (Moderate)
Category 1: Arithmetic > Ratio and Proportion >
Category 2: Word Problems > Rate Problems > Speed

Explanation: Given a number of frames, you will need a rate of display to determine the amount of time it takes to run the cartoon. Statement (1) does that: while the rate is in terms of seconds instead of minutes, that can be converted, so the statement is sufficient.

Statement (2) is more involved, but still sufficient. If it takes x minutes to run the cartoon, it takes ((x)/6) minutes to rewind it, for a total of ((7x)/6) minutes, which is equal to 14. If ((7x)/6) = 14, you can solve for x, the amount of time it takes to run the cartoon. Both statements are sufficient, so the correct choice is (D).

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