Answer any One question : From a quay o...

Answer any One question : From a quay of a river, 600 metres wide, two boats start in two different directions to reach the opposite side of the river. The first boat moves making an angle of `30^@` with this bank and the second moves making an angle `90^@` with direction of the first boat. What will be the distance between the two boats when both of them reach the other side?

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