A group of athletes participated in a 6-mile race, achieving average speeds between 5 miles per hour and 8 miles per hour, inclusive. Which of the following completion times could be achieved by individual athletes?
I. 45 minutes
II. 54 minutes
III. 72 minutes

Answer Choices

Correct answer marked below

I only

II only

III only

I and III only

I, II and III

Correct

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Official Explanation

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The athletes ran a 6-mile race at average speeds ranging from 5 miles per hour to 8 miles per hour, inclusive. We need to determine the possible completion times for individual athletes. I. 45 minutes II. 54 minutes III. 72 minutes.…

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Comments

KshitizDec 22, 2024

finally understood this

JackSep 18, 2024

Greatt

What this question tests

What it tests

Your application of distance = rate × time to trains, boats, and commuters, including relative speed.

Common trap

Mixing units (miles per hour vs. minutes) or averaging speeds — average speed is total distance over total time.

A group of athletes participated in a 6-mile race, achieving average speeds between 5 miles per hour and 8 miles per hour, inclusive. Which of the following completion times could be achieved by individual athletes? I. 45 minutes II. 54 minutes III. 72 minutes