Calculating Electron Drift Time in Copper Wire: Density Question

[thename1000]

The density of mobile electrons in copper metal is 8.4 1028 m-3. Suppose that i = 7.5 1018 electrons/s are drifting through a copper wire. (This is a typical value for a simple circuit.) The diameter of the wire is 1.7 mm. In this case, about how many minutes would it take for a single electron in the electron sea to drift from one end to the other end of a wire 31 cm long?

Answer: in minutes please

 

[Astronuc]

Please show some work.

One had the electron density, in electrons/m², and N electrons/s are drifting in a current.

What is the formula that relates current, electron density, cross-sectional area of the wire, and drift velocity of the electrons?

http://hyperphysics.phy-astr.gsu.edu/hbase/electric/miccur.html