Thursday

January 29, 2015

January 29, 2015

Posted by **Rebecca** on Wednesday, January 4, 2012 at 3:34pm.

- 7th Grade Math -
**Steve**, Wednesday, January 4, 2012 at 4:40pmthe distances are hew same, though unknown.

let the distance be d. time = distance/speed. Add up the times:

d/4.5 + d/5.5 = .8

10d = 19.8

d = 1.98km

d/4.5 = .44hour

d/5.5 = .36hour

total = .80 hour = 48 min.

- 7th Grade Math -
**TutorCat**, Wednesday, January 4, 2012 at 4:41pmDistance= rate*time

Distance upstream = distance downstream

Time should be converted to hour b/c the units for rate is in /hour. We know the total time so assign one of the times x (upstream time b/c you would only have to solve for x to get its time) and the other the total time in hour-x.

**Answer this Question**

**Related Questions**

Math - Toni rows a boat 4.5 km/h upstream and then turns around and rows 5.5 km/...

algebra - rowing. Abby rows 10 km upstream and 10 km back in a total time of 3 ...

math - Rowing. Abby rows 10 km upstream and 10 km back in a total time of 3 hr. ...

intermediate algebra - Rowing. Abby rows 10km. upstream and 10km. back in a ...

applications involving quadratic - Abby rows 10 km upstream and 10 km back in a ...

Algebra - A boy can row a boat at a constant rate of 5 mi/hr in still water. He ...

math - Mr. Tip is working on the marching band's halftime show. During the first...

Physics - A boat is to be driven from a point on the South bank of a river which...

College Algebra - A boy can row a boat at a constant rate of 5 mi/hr in still ...

math - a man rows downstream for one hour and 40 minutes on a river flowing at 2...