Posted by Karen on Monday, September 26, 2011 at 6:22pm.
If the boat is headed upstream, so that it moves directly across the stream, then
sinTheta=10/16 where theta is the angle upstream frm the line across.
then velocity across= 16cosTheta
a boat can travel 3m/s in still water. a boatman wants to cross a river while covering shortest distance. how long will it take him to cross the river if speed of water is (a) 2m/s (b) 4 m/s
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