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Don and Frank started from the same point and drove in opposite directions. Don's rate of travel was 50 miles per hour. Frank's rate of travel was 40 miles per hour. How many miles apart were they at the end of 2 hours?

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Answer:

180 miles

Explanation:

Don drove (50 mi/h)×(2 h) = 100 mi.

Frank drove (40 mi/h)×(2 h) = 80 mi.

Since they drove in opposite directions, the total distance between them is

100 mi +80 mi = 180 mi.

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