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An army from the top of a 75 m high ligh...

An army from the top of a 75 m high light house from the sea level, observes some suspicious activities of two ships which are sailing towards it and immediately reports it to the navy chief. The angle of depression of two ships are `45^(@)` and `30^(@)` respectively.
(i) Find the distance between the two ships.
(ii) What value of the army is shown here ?

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