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02-07-2018
Mathematics

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Jim paddles from one shore of a lake 3 miles wide at 4mph, and John paddled from the opposite shore at 5mph . How long will they travel before they meet ?

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musiclover10045 musiclover10045

02-07-2018

Let X = time

Jim paddles 4 mph for x time = 4x
John paddles 5 mph for x time = 5x

write an equation: 4x +5x = 3 miles

9x = 3 miles

Divide both sides by 9:

x = 3/9

x = 1/3 of an hour = 20 minutes.

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