I need to know to solve this word problem

User Generated

xyvh11

Mathematics

Description

Kenny can row 4 mph in still water. He rows 12 miles downstream on the Yellow River and returns upstream in a total of 8 hours. Find the speed of the current.

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Explanation & Answer

You need to have the speed that the river flows. 
If he's rowing 12 miles downstream it will take him 12/(4mph + river speed) [hours] 
If he's rowing 12 miles back up stream it will take him 12/(4mph - river speed) [hours]


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