Effusion Equation Help | Find Expressions for v1 and v2

[bon]

Homework Statement

Maxwellian gas effuses through a small hole to form a beam. After a certain distance from the hole, the beam hits a screen. Let v1 be the most probable speed of atoms that during a fixed time interval, hit the screen. Let v2 be the most probable speed of atoms situated at any instant between the small hole and screen. Find expressions for v1 and v2

Homework Equations

The Attempt at a Solution

So this is all we've been given, which is a bit confusing.

So i know the effusion equation..so I know that molecular flux is proportional to p over root T, but i just don't see how to do this question?!

 

[bon]

anyone...?