SOLUTION: You head downstream on a river in an outboard. The current is flowing at a rate of 1.50 m/s. After 30 min, you find that you have traveled 24.3 km. How long will it take you to tra

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: You head downstream on a river in an outboard. The current is flowing at a rate of 1.50 m/s. After 30 min, you find that you have traveled 24.3 km. How long will it take you to tra      Log On

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Question 726511: You head downstream on a river in an outboard. The current is flowing at a rate of 1.50 m/s. After 30 min, you find that you have traveled 24.3 km. How long will it take you to travel back upstream to your original point of departure?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
You head downstream on a river in an outboard.
The current is flowing at a rate of 1.50 m/s.
Convert m/s to km/hr
%281.5%2A3600%29%2F1000 = 5.4 km/hr is the current
:
After 30 min, you find that you have traveled 24.3 km.
Effective speed: 2 * 24.3 = 48.6 km/hr
Boat speed in still water 48.6 - 5.4 = 43.2 km/hr
:
How long will it take you to travel back upstream to your original point of departure?
24.3%2F%28%2843.2-5.4%29%29 = .643 hrs; .643*60 = 38.57 min to return