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You are riding in a boat whose speed relative to the water is 4.5 m/s. The boat points at an angle of 25.1¡ã upstream on a river flowing at 12.8 m/s. Find the time it takes for the boat to reach the opposite shore if the river is 26.2 m wide.

  • physics - ,

    d = 26.2/cos25 = 28.91 m. = Distance the
    boat must travel to reach shore.

    T = d/r = 28.91m./4.5m/s = 6.42 s.

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