Muzzle Velocity

[steram]

1. The problem statement, all variables and given/known data
Hi everyone. I've hit a bit of a wall with some coursework.

I've been asked to calculate muzzle velocity of a fired weapon based on the following data:

Bullet mass and calibre
Bullet drop distance (between target using laser and where the bullet actually hit)
Distance between gun and target
Actual velocities measured by a chronograph (we are supposed to be comparing

Can anyone give me a nudge in the right direction on how i'm supposed to calculate muzzle vel. based on this? Thanks.


2. Relevant equations
Unknown.


3. The attempt at a solution
I have considered the final velocity equation, but I don't have the required data for this either. So i'm a bit lost!

[sgd37]

the bullet flight time is given by the drop distance divided by g all squarerooted

Tell me was that pun intended