Calculating free electrons per meter length of wire?

You need the value of An
n is the number of free electrons per unit volume and A is the x-sectional area
so An gives the number of free electrons per unit length
[if you don't understand the above, some dimensional analysis helps you to get the answer]

therefore, you need to evaluate An = I/(ev)

Thank you for the response. I'm kind of having trouble understanding why A*n is the number of electrons per unit length, is there any way you could explain it?

n is the number of free electrons per unit volume and A is the x-sectional area
multiplying [per unit volume] by [area] gives [per unit length]

i.e multiplying m^-3 by m^2 gives m^-1

so multiplying n by A gives the number of free electrons per unit length

what answer did u get for this?