To find: The speed of crew in still water.
The speed of crew in still water is 6 km.
A crew takes 2 h 40 min to row 6 km upstream and downstream.
The rate of flow of the stream is 3 km/h.
Distance formula is,
Let the speed of crew be x.
Tabulate the given information into the language of algebra.
Model the equation for the above information.
Simplify the above equation for x,
Factor the above equation.
The speed cannot be negative, so the speed of crew is 6 km.
Thus, the speed of crew in still water is 6 km.
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