Math
posted by Teresa .
Boat travels 10 mi upstream and 10 mi downstream the stream is moving 1mph and the boat took 5 1/3hrs. What is the speed of boat if the stream still?
I need help ASAP!!!! PLEASE!!!

Math 
Reiny
speed of boat in still water  x mph
time upstream = 10/(x1)
time downstream = 10/(x+1)
isn't the total time 16/3 hours ?
I am sure you can take it from here.
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