an aeroplane leaves an airport A an flies on a bearing of N41E for 1 and half hour at 699km/h to airport B.it then flies on a bearing of S50E for 3 and half hours at 400km/h to an airport C.calculate the distance from C to A

Answer 1

planes fly on headings, not bearings.

Use the law of cosines:

CA^2 = AB^2 + BC^2 - 2*AB*BC*cos(41+50)°

You can easily get AB and BC using distance = speed * time.