Book Solving Complex Math Problems

[leprofece]

View attachment 2703

Book Solution

View attachment 2704

in this problem Part 1 I got it
Part 2 Tab +Tba = 6,7 seg
Where does it comes from??
the third one (804,5 +vw )Tba = 2655
but it got 98,1
then time must be 2,4 seg
How do I get It?

 

[leprofece]

MODIFIED

354. City A lies directly west of city B. When there is no wind, an airliner makes the 5550-km roundtrip flight between them in 6,60 h of fl?
of flying time while traveling at to same speed In both directions. When a strong. steady wind is blowing from west to east and the airliner has the same airspeed as before, round trip takes 6,7 h at what speed does the wind blow?

Answer 98 m/seg