I'm not sure how to clearly express my query, so I'll round up the gist of it. I understand that this is an entry level question. I was told that, in order to calculate Volume Flow Rate (VFR), I would use these equations: * Q = Velocity * Area [EQUATION 1] * Q = Volume / Time [EQUATION 2] Units: m^3 / s Questions: ^Do I use both equations? Are they both deemed correct or only one and which one? ^Can you give an example problem or scenario in which I would use the appropriate equation?