Lamont traveled $80$ miles in $2.5$ hours, at a constant rate. He then decreased his speed by $25\%$ and traveled

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by BTGmoderatorLU » Thu Jun 25, 2026 11:27 am

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Lamont traveled $80$ miles in $2.5$ hours, at a constant rate. He then decreased his speed by $25\%$ and traveled $120$ additional miles at the new constant rate. How many hours did the entire journey take?

A. $6.25$
B. $7.5$
C. $8.75$
D. $10$
E. $11.25$

The OA is B

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Source: Beat The GMAT — Problem Solving | Thu Jun 25, 2026 11:27 am

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