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OpenStudy (anonymous):
A boat travels at a rate of 15km/hr in still water . It travels 60km upstream in the same time that it travels 90km downstream. What is the rate of the current ?
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OpenStudy (mathstudent55):
Current speed = c Boat speed is still water = s Boat speed upstream = s - c Boat speed downstream = s + c
OpenStudy (mathstudent55):
speed = distance/time
OpenStudy (mathstudent55):
distance = speed * time
OpenStudy (mathstudent55):
You understand the table so far? |dw:1435634606883:dw|
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