If the speed of the boat in still water is a, the speed of the river flow is x, then the speed of the boat against the flow is …
| August 22, 2021 | education
The speed of a boat in still water is its own speed, a constant value. The flow of the river changes this speed, because it impedes the movement, or vice versa, accelerates the movement of the boat. If the boat moves with the current, then its speed increases by the speed of the river, if against the current, then, accordingly, the speed of the boat decreases. Thus, the correct answer is 3) a-x.
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