On a certain trip, a cyclist averaged $20$ miles per hour for the $10$ miles and $16$ miles per hour for the remai

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by M7MBA » Sun Jan 31, 2021 1:48 pm

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On a certain trip, a cyclist averaged $20$ miles per hour for the $10$ miles and $16$ miles per hour for the remaining $20$ miles. If the cyclist returned immediately via the same route and took a total of $4$ hours for the round trip, what was the average speed, in miles, for the return trip?

A. $24$
B. $18$
C. $17 \frac17$
D. $15$
E. $13 \frac13$

Answer: E

Source: GMAT Paper Tests

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Source: Beat The GMAT — Problem Solving | Sun Jan 31, 2021 1:48 pm

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