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A pair of scuba divers wish to dive on a wreck that lies 0.4 km off the shore from a point 0.8 km from their

A pair of scuba divers wish to dive on a wreck that lies 0.4 km off the shore from a point 0.8 km from

their present position. If they can walk carrying their gear at 5 km/h and swim at 3 km/h, what course

should they follow to reach the wreck in minimum time?

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