A lifeguard sits on his watchtower at the edge of the pool, Physics

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A lifeguard sits on his watchtower at the edge of the pool

A lifeguard sits on his watchtower at the edge of the pool at a height h=2.0m above the surface of the water. A watch sitting at the bottom of the pool and located a distance d=3.2m away from the edge are seen by the lifeguard when light from the watch is refracted at the surface of the water at an angle of 38 from the surface. What is the depth of the pool at the location of the watch?

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Physics: A lifeguard sits on his watchtower at the edge of the pool

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