As observed from the top of a 75 m high lighthouse from the sea-level, the angles of depression of two ships are  30

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Q 3031712622.     As observed from the top of a 75 m high lighthouse from the sea-level, the angles of depression of two ships are  30 ^{ \circ } and  45 ^{ \circ }`. If one ship is exactly behind the other on the same side of the lighthouse, find the distance between the two ships.

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