A boat crosses a river of width 152 m in which the current, Ask an Expert

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A boat crosses a river of width 152 m in which the current has a uniform speed of 1.97 m/s. The pilot maintains a bearing (i.e., the direction in which the boat points) perpendicular to the river and a throttle setting to give a constant speed of 3.03 m/s relative to the water.

What is the magnitude of the speed of the boat relative to a stationary shore observer?

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