Mathematics, 20.03.2020 01:28, fifamonkey772

A motorboat left a harbor and traveled to an island at an average rate of 13 knots. The average speed on the return trip was 10 knots. If the total trip took 6.9 hours, how far is the harbor from the island?

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A motorboat left a harbor and traveled to an island at an average rate of 13 knots. The average spee...