Question 319921
D=RT
6,480=R9
R=6,480/9=720 KMH AGAINST THE WIND.
6,480=R8
R=6,480/8
R=810 KMH WITH THE WIND.
(810-720)/2=90/2=45 KMH IS THE SPEED OF THE WIND.
PROOF:
720+45=765 SPEED OF THE PLANE IN STILL AIR
810-45=765 DITTO.