Question
Two train leave a city at the same time. One travels north, and the other travels south $20 \mathrm{mph}$ faster. $\operatorname{In} 2 \mathrm{hr},$ the trains are $280 \mathrm{mi}$ apart. Find their rates.
Step 1
Then the rate of the southbound train is $x + 20$ mph. Show more…
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