SOLUTION: One day Eli set out for a trip across the lake on his motorboat at a rate of 8 mph. Along the way the motor broke down. Eli rowed back at a rate of 2 mph. He was gone for 5 hrs. Ho

Question 186865: One day Eli set out for a trip across the lake on his motorboat at a rate of 8 mph. Along the way the motor broke down. Eli rowed back at a rate of 2 mph. He was gone for 5 hrs. How far did Eli row?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
One day Eli set out for a trip across the lake on his motorboat at a rate
of 8 mph. Along the way the motor broke down. Eli rowed back at a rate of
2 mph. He was gone for 5 hrs. How far did Eli row?
:
Let d = distance he rowed (and distance he went before he broke down)
:
Write a time equation: Time =
:
Time motoring + time rowing = 5 hrs
+ = 5
Multiply equation by 8:
d + 4d = 8(5)
5d = 40
d =
d = 8 mi, he rowed his boat
:
:
Check solution by finding the times:
8/8 = 1hr
8/2 = 4hr
-----------
total 5 hr

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