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Biking at 10 mph, it takes Kristen an 1/2 hour to reach the train station to go to work. Kristen then takes the train to work, and it takes another 1/2 hour for her to get to work when the train travels
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Biking at 10 mph, it takes Kristen an 1/2 hour to reach the train station to go to work. Kristen then takes the train to work, and it takes another 1/2 hour for her to get to work when the train travels 20 mph. How far does Kristen travel to work?

User Waneck
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kristen travels 15 miles.
i know this because 10 divided by 2 is 5
added to 10 because 20 divided by 2 is 10.
5+10=15
User Sblandin
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