Max Height Achieved by Ball in Physics Project

[Michael17]

Can anyone please help me figure this question out;

A senior physics class conducting a research project on projectile motion constructs a device that can launch a cricket ball. The launching device is designed so that the ball can be launched at ground level with an initial velocity of 28m/s at an angle of 30 degrees to the horizontal. What is the maximum height that is achieved by the ball, given that the acceleration due to gravity is 9.8m/s and there is no air resistance?

 

[Nabeshin]

Any Ideas? Have you attempted the problem?

 

[harvellt]

Witch kinematics equations do you think would be a good start?