Equations for average and maximum velocity

[subopolois]

Homework Statement

Given height dropped and gravity constant, what is the maximum and average velocity of an object dropped from a building.
Gravity- 9.81
(Delta)y- 45 m. Height from which object is dropped
T- 3.1 seconds

Homework Equations

V= v(final)-v(initial)= a x (delta)t
V(avg)= (sqrt (2 x g x (delta)y)) / 2

The Attempt at a Solution

I'm not looking for the answers, just reassurance I'm on the right track and using the right equations. So above I think I have the right equation for maximum velocity for the first equation and average velocity for the second equation.

 

[mfb]

The formulas are right, but the average velocity can be calculated in a much easier way.