Projectile motion question?

a ball thrown horizontally at 25m/s travels a horizontal distance of 50m before hitting the ground. from what height was the ball thrown? I tried to do the question by resolving it into the x and y components but i got confused because the angle is not given. i understand if you t=2s if you do distance over... show more a ball thrown horizontally at 25m/s travels a horizontal distance of 50m before hitting the ground. from what height was the ball thrown?

I tried to do the question by resolving it into the x and y components but i got confused because the angle is not given.

i understand if you t=2s if you do distance over time but i don't understand how this is a projectile motion question then:S
Update: sorry, distance over velocity*
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