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Sagot :
The angle of the upstream of the driver of the boat is 30°
The velocity of the boat = Vb = 10m/s
The velocity of the water in the river = Vw = 5m/s
θ = [tex]sin^{-1}[/tex] (Vr/Vb)
θ = [tex]sin^{-1}[/tex] (5/10) = 30°
Upstream refers to a boat that is moving against the flow of the stream. The term " speed" in this context refers to the boat's net speed. Downstream. A boat is said. to be moving downstream if it is moving. in the same direction as the stream. A stream is the name for the flowing water. in a river. The difference when speaking about water in rivers and streams is that upstream, also known as upriver, is in opposition to the water flow and in the direction of the water's original source (where the river originates). For instance, a boat can navigate upstream against the river's downward flow.
Learn more about upstream here:
https://brainly.com/question/3047482
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