Velocity relative to ground

[soynv]

1. At a particular instant, a stationary observer on the ground sees a package falling with speed v1 at an angle to the vertical. To a pilot flying horizontally at constant speed relative to the ground, the package appears to be falling vertically with a speed v2 at that instant.
WHAT IS THE SPEED OF THE PILOT RELATIVE TO THE GROUND.


2. Homework Equations
Pythagorean Theorem

The Attempt at a Solution

I have no idea how to draw this picture up. please help.
thanks

 

[liorda]

draw the velocity vectors of the package and the pilot. the pilot sees the package as is it falls vertically - use that as a connection between their vectors.