How Far Will the Sled Travel from the Cliff?

[Todd88]

Homework Statement

A sled with rider having a combined mass of 130kg travels over the perfectly smooth icy hill shown in the accompanying figure.

Homework Equations

How far does the sled land from the foot of the cliff?

The Attempt at a Solution

Honestly, I have no idea how to go about this problem. I am sure that I am supposed to use some energy conservation method but I don't know where to start.

 

[Todd88]

EDIT:: sorry I figured it out. Thanks! :)