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March 1, 2015

March 1, 2015

Posted by **Angie** on Saturday, January 17, 2009 at 3:39pm.

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**, Saturday, January 17, 2009 at 4:23pmlet 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)

- Math -
**Angie**, Monday, January 19, 2009 at 4:32pmthanks!!!!!!!

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