The speed is the distance covered by an object at a particular time. The speed at which the fisherman travels in still water is 11 mph.
What is speed?
The speed is the distance covered by an object at a particular time. Therefore, it is the ratio of distance and time.
[tex]\rm{Speed = \dfrac{Distance}{Time}[/tex]
Let the speed of the boat be represented by x mph.
A fisherman travels 8 miles downstream with the current at the same time that he travels 3 miles upstream against the current. Also, the speed of the current was 5 mph. Therefore,
8 miles/ (x + 5)mph = 3 miles/(x - 5) mph
8x - 40 = 3x + 15
5x = 55
x = 11 mph
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