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Sun 10 Jul, 2005 05:12 pm
A motorboat maintained a constant speed of 15 miles per hour relative to the water in going 10 miles upstream and then returning. The total time for the trip was 1.5 hours. What is the speed of the current?
time = distance / rate
time upstream = distance upstream / rate upstream
time downstream = distance downstream / rate downstream
time upstream + time downstream = total time
The distances and total time are given.
The rate upstream is the rate of the boat minus the rate of the water.
The rate downstream is the rate of the boat plus the rate of the water.
See if you can take it from there.
Yes
Yes, I can take it from here using your information.
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