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Subject: algebra Len is planning a three-hour trip down the Alleman River and back to his starting point. He knows that he can paddle in still water at 3 mph and that the rate of the current is 2 mph. How much time can he spend going downstream? How far downstream can he travel?
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Hi Anita, Since this is a three-hour round trip if he spends t hours paddling downstream he must spend 3 - t hours paddling upstream. Going downstream he travels at 3 + 2 = 5 mph. Traveling at 5 mph for t hours how far does he go? Going upstream he travels at 3 - 2 = 1 mph. Traveling at 1 mph for 3 - t hours how far does he go? Since the is a round trip the distance he travels downstream is the same as the distance he travels upstream. Penny |
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