Asked by gagan
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.
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.
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.
Answers
Answered by
bobpursley
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
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
Answered by
gagan
is the answer 727.5
thnx
thnx
Answered by
Reiny
You posted the same type of question
above in
http://www.jiskha.com/display.cgi?id=1232677828
Only the numbers differ.
above in
http://www.jiskha.com/display.cgi?id=1232677828
Only the numbers differ.
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