Flying into the wind, a plane takes 8 h to travel 5432 km from Paris to Montreal. The same plane flying with the wind from Montreal to Paris takes only 7 h. Find the speed of the plane and the speed of the wind.

Question

Can you plz answer this sir I really would appriciete it. Plz can you answer this because i have a exam tommorow and i do not want to fail so plz and thnx for all the help.

Answer 1

vp is plane velocity
vw is wind velocity

5432=(vp+vw)7
5432=(vp-vw)8
or
vp+vw= 5432/7
vp-vw=5432/8
add the equations...
2vp=5432(1/7+1/8) and solve for vp
then put that into either equation, and solve for vw

Answer 2

is the answer 727.5
thnx

Answer 3

You posted the same type of question
above in
http://www.jiskha.com/display.cgi?id=1232677828

Only the numbers differ.