12-234. A man can swim at 4 ft/s in still water. He wishes
Chapter 12, Problem 12-234(choose chapter or problem)
12-234. A man can swim at 4 ft/s in still water. He wishes to cross the 40-ft-wide river to point B, 30 ft downstream. If the river flows with a velocity of 2 ft/s. determine the speed of the man and the time needed to make the crossing. Note: While in the water he must not direct himself toward point B to reach this point. Why?
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