subject

Acanoe in still water travels at a rate of 10 miles per hour. the current today is traveling at a rate of 3 miles per hour. if it took an extra hour to travel upstream, how far was the trip one way?
about 13 miles
about 14 miles
about 15 miles
about 16 miles

a plane traveling from phoenix to washington, d. c with a tailwind of 20 miles per hour takes 3 hours. the return trip in the same wind, which is now a headwind, takes the same plane 3 hours and 12 minutes. what is the average speed of the plane in calm conditions?

600 miles/hour
620 miles/hour
650 miles/hour
700 miles/hour

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