SOLUTION: Josh can row a boat at an average speed that is eight times as fast as his average swimming speed. It takes him 80 minutes more to swim 4 laps in a lake than to row 4 laps. How fas
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Question 1076901: Josh can row a boat at an average speed that is eight times as fast as his average swimming speed. It takes him 80 minutes more to swim 4 laps in a lake than to row 4 laps. How fast is his average swimming speed in laps per minute? Round your answer to two decimal places. Found 2 solutions by stanbon, MathTherapy:Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! Josh can row a boat at an average speed that is eight times as fast as his average swimming speed. It takes him 80 minutes more to swim 4 laps in a lake than to row 4 laps. How fast is his average swimming speed in laps per minute? Round your answer to two decimal places.
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Swim DATA:
rate = r laps/min ; time = (t+80) min ; distance = r*t + 80r laps
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Row DATA:
rate = 8r laps/min ; time = t min ; distance = 8rt laps
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Equation:
rt+80r = 8rt
7rt = 80r
time = 80/7 = 11.42 min for 4 laps
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Ans: 11.42/4 = 2.855 min per lap
rate = 1/2.855 = 0.35 laps per min
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Cheers,
Stan H.
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You can put this solution on YOUR website!
Josh can row a boat at an average speed that is eight times as fast as his average swimming speed. It takes him 80 minutes more to swim 4 laps in a lake than to row 4 laps. How fast is his average swimming speed in laps per minute? Round your answer to two decimal places.
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