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