Posted by janaki on .
If an airplane directly north at 2000 km/hr and there are 50 mph/hr winds blowing west. whis is the actual path of the plane seen from someone on the ground?
What is the ground speed of the plane in mph?

science 
Henry,
X = 50 km/h,
Y = 2000 km/h.
tanAr = Y/X = 2000/50 40.0
Ar = 88.6o = Reference angle.
A = 88.6 + 180 = 91.4o = Direction..
V = 50/cos91.4 = 2000.62 km.