Need to find distance of an object over an incline plane

[snailpoop]

Homework Statement

an object is traveling 30 m/s up a 30 degree incline with height of 20, (there is zero friction) how far did it go?

Homework Equations

no idea

The Attempt at a Solution

stuck

 

[Hypersphere]

Since there is no friction, think of why the object would come to a stop.

 

[snailpoop]

because of acceleration due to gravity

 

[Hypersphere]

because of acceleration due to gravity

Indeed. So, at which height y (measured vertically, not up the incline) does it stop rising?