Answer:
Speed of airplane relative to air is 89.4427 m/s.
Explanation:
Given data :-
i) The aircraft flies in north direction.
ii) The speed of aircraft ( v₁ ) = 80 km/h.
iii) The wind blowing in east direction.
iv) The speed of wind ( v₂ ) = 40 km/h.
v) The angle between aircraft and wind is 90°
We have to find the speed of airplane relative to air ( v₁₂ ).
v₁₂ =[tex]\sqrt{40^{2} +80^{2} }[/tex] = √8000 = 89.4427 m/s.
The speed of airplane relative to air is 89.4427 m/s.
