Solving Kinematics: A Ball Thrown Upward

[therest]

Homework Statement

A ball is thrown vertically upward with a speed of 25.2 m/s.
a)How high does it rise? Answer in units of m.
b) How long does it take to reach its highest point? Answer in units of s.
c) How long does it take the ball to hit the ground after it reaches its highest point? Answer in units of s.
d) What is its velocity when it returns to the level from which it started? Answer in units
of m/s.

Homework Equations

all kinematics equations.
I used x=x0 + v0t + (1/2)at^2, I remember.

The Attempt at a Solution

I have a thru c - a was 32.37, and b abd c were both 2.57 (parabola was symmetrical) but I have no idea how to solve d, at all.

 

[ryan88]

Since the ball is taking the same time to rise as it is to fall again, this would mean that by the time the ball reached the same level it was as at when it started, it would be going the same speed as it was when it was first thrown upwards.