Official Guide Explanation:
Problem Solving #34








Solution and Metadata

Question: 34
Page: 157
Difficulty: 5 (Moderate)
Category 1: Word Problems > Rate Problems > Speed
Category 2: Algebra > Equations >

Explanation: This is very similar to question 28, and can be solved in the same way. You're looking for time, and since time = ((dist)/(rate)), you'll need distance and rate first. The question tells you Juan can run y yards in 11 seconds, so his rate is ((y)/11). Since the question is looking for the time it takes for him to run x yards, x is the distance. Thus, time = ((dist)/(rate)) = ((x)/(((y)/11))) = x((11/(y))) = ((11x)/(y)), choice (A).

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