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A boat can cover 12 km up the stream and 75% of that distance down the stream in 8 hours. Find the speed of the boat in still water if the speed of the stream is 41 2/3 meters per minute.

 May 9, 2021
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s = still water speed       41 2/3 m/min = 2.5 km hr

s+2.5 = downstream speed       for   9 km

s- 2.5 = upstream speed           for  12 km      

 

12 / (s-2.5)  + 9 / ( s+ 2.5) = 8   solve for   's'               can you take it from here?

 May 10, 2021
edited by ElectricPavlov  May 10, 2021
 #2
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https://web2.0calc.com/questions/i-hate-d-n-computers

Guest May 10, 2021

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