Answer:
v = 80.62 km/h
Step-by-step explanation:
Given that,
An airplane normally flying at 80 km/h north encounters a wind from the west of 10km/h at right angle to its forward motion a crosswind.
We need to find the resultant velocity of the airplane. It can be calculated as follows :
![v=√(80^2+10^2) \\\\v=80.62\ km/h](https://img.qammunity.org/2022/formulas/physics/college/f1se3d7r3zovc1lgluhf7mx3tlpx6tzk8n.png)
So, the required velocity is 80.62 km/h.