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Answer: Devon drove 10 miles further

Step-by-step explanation: Devon drove 100 miles and Andrew drove 90

Devon drove farther.
60mph for 1.5 hours is 60+30 to get 90.
Devon is 50mph for 2 hours which is 50+50 to get 100
So Andrew drove 90 miles and Devon drove 100 miles.
Therefore, Devon drove farther
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