SOLUTION: With a head wind, a plane traveled 840 miles northward in 2 hours. With the same wind as a tail wind, the return trip southward took 1 hour 45 minutes. Find the plane's air speed a

SOLUTION: With a head wind, a plane traveled 840 miles northward in 2 hours. With the same wind as a tail wind, the return trip southward took 1 hour 45 minutes. Find the plane's air speed a

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Question 697574: With a head wind, a plane traveled 840 miles northward in 2 hours. With the same wind as a tail wind, the return trip southward took 1 hour 45 minutes. Find the plane's air speed and the wind speed.
Help please?
Answer by lynnlo(4176) (Show Source): You can put this solution on YOUR website!
840/2=420mph against the wind
840/1.75=480mph with a head wind
(480-420)/2
60/2=30mile head/tail wind
proof
420+30=450-30
450============plane
30miles wind speed
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