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A person swims 11 miles downriver in the same time they can swim 7miles upriver. The speed of the current is 4 mph, find the speed of the person in still water
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1 vote
A person swims 11 miles

downriver in the same time
they can swim 7miles
upriver. The speed of the
current is 4 mph, find the speed of the person in still water

User Cenny
by
7.9k points

1 Answer

2 votes
7 / x-4 = 11 / x+4

7x + 28 = 11x - 44

72 = 4x

Answer is x = 16
User Fnkr
by
8.3k points
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