Question 1187907
A ferry leaves a harbor and travels to a resort island at an average speed of 18 mph. On the return trip, because of fog, the ferry travels at an average speed of 10 mph. The total time for the trip is 7 h. How far is the island from the harbor?
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Avg speed of any round trip is {{{2*v[1]*v[2]/(v[1]+v[2])}}}
RT distance = Avg speed*7 hours