Question 275234
D=RT
3,490=R*5
R=3,490/5
R=698 KMH IS THE RATE AGAINST THE WIND.
3,940=5*5
R=3,940/5
R=788 KMH IS THE RATE OF THE PLANE WITH THE WIND.
(788-698)/2
90/2=45 KMH IS THE RATE OF THE WIND.
698+45=743 KPH IS THE RATE OF THE PLANE IN STILL AIR.
788-45=743 DITTO.