Question 179556
Scott wants to swim across a river that is 400 meters wide. He begins swimming perpendicular to the shore he started from but ends up 100 meters down river from where he started because of the current. How far did he actually swim from his starting point? 
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Draw the picture.
You have a right triangle and you want to find the length of the hypotenuse.
h = sqrt[400^2 + 100^2]
h = sqrt[160000 + 10000]
h = 412.31 meters
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Cheers,
Stan H.