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Praxis II General Science

Category - Physics

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Rachel is running at a pace of 4 m/s, and her friend Ally is running at 5 m/s. If they have 1 mile to go before reaching home, how much sooner will Ally get home before Rachel?

30 seconds
80 seconds
120 seconds
150 seconds
180 seconds

Explanation

Answer: B -1 mile can be approximated as 1600 meters (exact is 1609 meters). Thus, Rachel will run one mile in 400 seconds, and Ally will run one mile in 320 seconds. This means Ally will beat Rachel home by 80 seconds.

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