Projectile motion without time or initial velocity

[entwistle 89]

Homework Statement

You throw a snowball from a height of 11m at an angle of 25 degrees to the horizontal to hit your teacher in the chest (1.5m from the ground) who is on the sidewalk 37m from you horizontally, at what velocity must you throw the snowball to hit your teacher

Homework Equations

d= v(t) + 1/2 a (t)^2

The Attempt at a Solution

Vx= v Cos(25)
Vy= v Sin(25)

I have no clue where to go from here to be completely honest

 

[ashishsinghal]

hint: you have 2 equations in two variables
the snowball should travel the given horizontal distance and also the given vertical distance in the same time