Ariver flows at a speed of 3 mph towards sea. a woman in a canoe can paddle through water at a speed of 7 mph. she wishes to paddle for a total time of 2 hours, first upstream (away from the sea) then turning round and paddling back to her starting point. how long should she paddle upstream?

She can paddle 5.71 miles upstream.

Explanation:

A woman in a canoe can paddle through water at a speed of 7 mph

Speed with which women can paddle = 7 mph

A river flows at a speed of 3 mph towards sea.

Speed of river = 3 mph

She need to paddle for 2 hours.

Let the distance paddled to upstream be d.

We have

    Velocity to upstream = 7 - 3 = 4 mph

    Velocity to downstream = 7 + 3 = 10 mph  

We have

She can paddle 5.71 miles upstream.

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explanation:

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explanation:

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