SOLUTION: A boat travesl 9 miles upstream in 3 hours. Going downstream it can travel 33 miles in the same amount of time. Find the speed of the current and the boat in still water.

Algebra ->  Graphs -> SOLUTION: A boat travesl 9 miles upstream in 3 hours. Going downstream it can travel 33 miles in the same amount of time. Find the speed of the current and the boat in still water.       Log On


   

Question 800838: A boat travesl 9 miles upstream in 3 hours. Going downstream it can travel 33 miles in the same amount of time. Find the speed of the current and the boat in still water.
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
boat speed =x mph
current speed =y mph
against current 3 hours
with current 3 hours

Distance against 9 miles distance with 33 miles
t=d/r against current -
9/( x-y )=3
x-y=3...............................(1)

33.00 /(x+y )=3
x+y=11...............................(2)
Add (1) & (2)
2x=14
x=7
y=4