Help me determine the diameter of a copper wire here?

[keni4eva]

An alluminuim wire of 7.5meter long is connected in parallel with a copper wire of 6meter long. When a current of 5A is passed through the combination, it is found that the current in the aluminuim wire is 3A. The diameter if the aluminuim wire is 1mm. Determine the diameter of the copper wire.
Resistivity of Aluminuim= 0.028mΩm
Resistivity of Copper is = 0.017mΩm

 

[aersoy]

PLS HELP

are you trying to complete your primary school homeworks
do it yourself boi or u never learn it
hint for you
R=ρ( L / A)
R => resistance
L => length
A => cross section ( area )
ρ => resistivity

and

V = R I ( Ohm's Law )

V > voltage in volts
R > resistance in ohms Ω
I > current in amperes

you can find these formulas in every book about fundamentals physics and circuit theory and magnetic books