First we need to convert all units into meters .

then we have that

This is the velocity at take off. Now the skier is a projectile

Now in the horizontal direction the only force is mass times gravity. Using the kinemetic equations to find when the skier hits the ground we get

Solving for t

Now in the x direction there are no forces so we get

dont forget that the above answer is in meters and (unlike me) don't surpress your units. So we get