Problem: A submarine is 400 m horizontally from the shore of a freshwater lake and 100 m beneath the surface of the water. A laser beam is sent from the submarine so that the beam strikes the surface of the water 300 m from the shore. A building stands on the shore, and the laser beam hits a target at the top of the building. Recall, the index of refraction of water is 1.33. Find the height of the target above the level of the water.

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A submarine is 400 m horizontally from the shore of a freshwater lake and 100 m beneath the surface of the water. A laser beam is sent from the submarine so that the beam strikes the surface of the water 300 m from the shore. A building stands on the shore, and the laser beam hits a target at the top of the building. Recall, the index of refraction of water is 1.33. Find the height of the target above the level of the water.