Math
posted by Angie .
Toni rows a boat 4.5 km/h upstream and then turns around and rows
5.5 km/h back downstream to her starting point. If her total rowing
time is 48 min, for how long does she row upstream? you can express
your answer to the nearest minute.
I don't understand how you solve it.

Math 
Reiny
let Toni's time rowing upstream be t hours, then his time rowing downstream is
.8t hours (48 min = .8 hours)
distance upstream = 4.5t
distance downstream = 5.5(.8t)
but the distance is the same either way, so...
4.5t = 5.5(.8t)
solve for t
your t will be in hours, so multiply the value of t by 60 and round off.
( I got 26 minutes) 
Math 
Angie
thanks!!!!!!!
Respond to this Question
Similar Questions

Algebra
A boy can row a boat at a constant rate of 5 mi/hr in still water. He rows upstream for 19 minutes and then rows downstream, returning to his starting point in another 13 minutes. What is the rate of the current? 
7th Grade Math
Toni rows a boat 4.5km/h upstream and then turns around and rows 5.5km/h back to her starting point. If her total rowing time is 48 min , for how long does she row upstream? 
algebra
could you please show me how to do this problem? 
math
a man rows downstream for one hour and 40 minutes on a river flowing at 2 miles per hour. on his returned trip he rows upstream for 5hours. find the distance that he traveled downstream and his speed of rowing in still water. 
College Algebra
A boy can row a boat at a constant rate of 5 mi/hr in still water, as indicated in the figure. He rows upstream for 24 minutes and then rows downstream, returning to his starting point in another 16 minutes. (Round your answers to … 
Math
Lisa rowed her boat for two miles downstream. The trip took her 20 minutes. She then turned around and rowed back the two miles. It took her one hour to row back upstream. a. At what rate of speed did Lisa row downstream? 
Math
Lisa rowed her boat for two miles downstream. The trip took her 20 minutes. She then turned around and rowed back the two miles. It took her one hour to row back upstream. a. At what rate of speed did Lisa row downstream? 
Please help
Lisa rowed her boat for two miles downstream. The trip took her 20 minutes. She then turned around and rowed back the two miles. It took her one hour to row back upstream. a. At what rate of speed did Lisa row downstream? 
Math
Lisa rowed her boat for two miles downstream. The trip took her 20 minutes. She then turned around and rowed back the two miles. It took her one hour to row back upstream. a. At what rate of speed did Lisa row downstream? 
algebra 2
Kate can row a boat 10 miles per hour in still water. in a river where the current is 5 miler per hour, it take her 4 hour longer to row a given distance upstream than to travel the same distance downstream. Find how long it takes …