Calculating Highest Point of a Swinging Ball

[teng125]

there is a ball attach to a string of 120cm attach to a centre point.
on the bottom,there is a fixed peg where the vertical distance from the c.point is 75cm.
as the ball swing,it hits the peg and goes up beyond,may i know how to find the highest point it goes??

 

[stunner5000pt]

vertical distance from the c.point is 75cm.

What does c.point mean??
Is there a diagram that is associated with thiws question, that you can post? It would help us, help you

 

[teng125]

oh.okok..nvm.i have just found the solution.thanx