Bob can row 14 mph in still water. The total time to travel downstream and return upstream to the starting point is 2.8 hours. I
f the total distance downstream and back is 36 miles, determine the speed of the river (current speed).
1 answer:
36/2=18
18/14+c +18/14-c=2.8
18(14-c)+18(14+c)=2.8(196-c²)
504=548.8-2.8c²
2.8c²=44.8
c²=16
c=±4
The current flows at 4 mph
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