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A person looking out the window of a stationary train notices that raindrops are falling vertically down at a speed of 6.80m/s relative to the

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A person looking out the window of a stationary train notices that raindrops are falling vertically down at a speed of 6.80m/s relative to the ground. When the train moves at a constant velocity, the raindrops make an angle of 25 when they move past the window as the drawing shows. How fast is the train moving

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