Physics

Jairo Coleman

31 October, 13:45

A river flows at a speed vr = 5.88 km/hr with respect to the shoreline. A boat needs to go perpendicular to the shoreline to reach a pier on the river's other side. To do so, the boat heads upstream at an angle θ = 31◦ from the direction to the boat's pier. Find the ratio of vb to vr, where vr is defined above and vb is the boat's speed with respect to the water.

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