Physics: To calculate and distance of the ball?

A marble is flicked off the edge of a platform . The marble initially has a velocity of 2.5m/s horizontally. It hits the ground after travelling a vertical distance of 2.0m. You may assume that the air resistance has a negligible effect on the motion of the marble. i) How long does it take for the marble to travel... show more A marble is flicked off the edge of a platform . The marble initially has a velocity of 2.5m/s horizontally. It hits the ground after travelling a vertical distance of 2.0m. You may assume that the air resistance has a negligible effect on the motion of the marble.
i) How long does it take for the marble to travel from the adge of the platform to the ground?
ii) Determine the range of the marble - the horizontal distance travelled by the marble before it hits the ground?
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