Question 662501
Jeremiah can kayak downstream a distance of 21 kilometers in 3 hours. Going upstream, he can kayak a distance of only 24 kilometers in 4 hours. How fast could Jeremiah kayak in still water (if there were no current)?
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d'stream speed = 21/3 = 7 km/hr
u'stream = 24/4 = 6 km/hr
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His speed is the average = 6.5 km/hr