SOLUTION: A motor boat can travel 45 kilometers downstream in 2 hours and 30 minutes and 39 kilometers upstream in 3 hours and 15 minutes. what is the speed of the boat in still water? what

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: A motor boat can travel 45 kilometers downstream in 2 hours and 30 minutes and 39 kilometers upstream in 3 hours and 15 minutes. what is the speed of the boat in still water? what       Log On


   

Question 951599: A motor boat can travel 45 kilometers downstream in 2 hours and 30 minutes and 39 kilometers upstream in 3 hours and 15 minutes. what is the speed of the boat in still water? what is the speed of the current?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
A motor boat can travel 45 kilometers downstream in 2 hours and 30 minutes and 39 kilometers upstream in 3 hours and 15 minutes. what is the speed of the boat in still water? what is the speed of the current?
===============
Find the 2 "groundspeeds."
The boat's speed wrt the water is the average of the 2.
The current is the difference between the boat's speed and groundspeed.