How long could an average human hold their breath underwater? is there a difference between holding your breath above and below water level?

Two minutes is the average and most reasonable time that a human can use in order to breathe long under the water. As per experiences, and according to some experts, there is no notable difference between breathing above and under the water, and it's more related to psychological matters only.

This is a pretty on point question because all we need to do is replace 's' in the equation with '35'.the calculation will be9.95 + 0.30s = c9.95 + 0.30 (35) = c9.95 + 10.5  = cc = 20.45