SOLUTION: A boat moves 9 kilometers upstream in the same amount of time it moves 15 kilometers downstream. If the rate of the current is 8 kilometers per hour, find the rate of the boat in s
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Question 964854: A boat moves 9 kilometers upstream in the same amount of time it moves 15 kilometers downstream. If the rate of the current is 8 kilometers per hour, find the rate of the boat in still water.
Answer by macston(5194) (Show Source): You can put this solution on YOUR website!
r=rate in still water
Cross multiply.
Subtract 9rkm from each side.
Add 120km^2/hr to each side.
Divide each side by 6km.
ANSWER: The rate of the boat in still water is 32 km/hr.
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CHECK:
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