an airplane is flying to east 200k m/h which is a velocity relative to the air,while a 100km/h wind blows towards the north-east.what is its resultant velocity?we need soluion and answer for this guestion

Answer 1

Make your vector diagram.
You should have a triangle with sides 200 and 100 and the contained angle of 135°.
The third side is your resultant velocity, call it x

by the cosine law:
x^2 = 200^2 + 100^2 - 2(200)(100)cos 135°

continue

let me know what you get