Posted by Rebecca on Wednesday, January 4, 2012 at 3:34pm.
the 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.
Distance= 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.
Related Questions
Math - Toni rows a boat 4.5 km/h upstream and then turns around and rows 5.5 km/...
intermediate algebra - Rowing. Abby rows 10km. upstream and 10km. back in a ...
math - Rowing. Abby rows 10 km upstream and 10 km back in a total time of 3 hr. ...
Algebra - A boy can row a boat at a constant rate of 5 mi/hr in still water. He ...
algebra - rowing. Abby rows 10 km upstream and 10 km back in a total time of 3 ...
applications involving quadratic - Abby rows 10 km upstream and 10 km back in a ...
math - Mr. Tip is working on the marching band's halftime show. During the ...
4th grade math - Please help solve this word problem Sara traced circle stencils...
Math - Sara traces circle stencils for her project. She needs 4 rows of 6 circle...
physics - a boy walks to a school at a rate of 6km with a speed of 2.5km/h and ...
For Further Reading
