SOLUTION: A motorboat leaves a dock and travels an average speed of 15mph towards an island. The speed on the return is only 10mph. If the return trip takes 1 hour longer, how far is the isl

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Question 1052000: A motorboat leaves a dock and travels an average speed of 15mph towards an island. The speed on the return is only 10mph. If the return trip takes 1 hour longer, how far is the island from the dock?
Answer by ikleyn(52908)   (Show Source): You can put this solution on YOUR website!
.
A motorboat leaves a dock and travels an average speed of 15mph towards an island. The speed on the return is only 10mph.
If the return trip takes 1 hour longer, how far is the island from the dock?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 

15t = 10*(t+1).

Solve for t (which is the time at the speed of 15 mph).

After finding t determine the distance as 15*t.


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