SOLUTION: If a boat goes downstream 72 miles in 3 hours and upstream 60 miles in 6 hours, the rate of the river and the rate of the boat in still water respectively are
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Question 508756: If a boat goes downstream 72 miles in 3 hours and upstream 60 miles in 6 hours, the rate of the river and the rate of the boat in still water respectively are
I have the answer but cannot figure out how to work problem. Please help
You can put this solution on YOUR website! If a boat goes downstream 72 miles in 3 hours and upstream 60 miles in 6 hours, the rate of the river and the rate of the boat in still water respectively are
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72/3 = 24 mi/hr
60/6 = 10 mi/hr
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The boat's speed is the average = (24+10)/2
= 17 mi/hr
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The current is the difference = 24-17 = 7 mi/hr
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Or, the hard way:
b = boat's speed
c = current
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b+c = 24
b-c = 10
---------- Add
2b = 34
b = 17 mi/hr
etc.
