An athlete runs R miles in H hours, then rides a bike Q miles in the same number of hours. Which of the following...

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GMAT Prep

An athlete runs R miles in H hours, then rides a bike Q miles in the same number of hours. Which of the following represents the average speed, in miles per hour, for these two activities combined?

A. (R-Q)/H
B. (R-Q)/2H
C. [2(R+Q)]/H
D. [2(R+Q)]/2H
E. (R+Q)/2H

OA E

[Jay@ManhattanReview]

GMAT Prep

An athlete runs R miles in H hours, then rides a bike Q miles in the same number of hours. Which of the following represents the average speed, in miles per hour, for these two activities combined?

A. (R-Q)/H
B. (R-Q)/2H
C. [2(R+Q)]/H
D. [2(R+Q)]/2H
E. (R+Q)/2H

OA E

Average speed = Total distance / Total time = (R + Q) / (H + H) = (R+Q)/2H

Correct answer: E

Hope this helps!

-Jay
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