The question states:
"Resistance of filament lamp at its working temp is 11 ohms.
Filament has length 0.36m and diameter of 32μm.
Cal resistivity of the metal that is used for the filament when the lamp is at its working temp... give an appropriate unit for the answer"
First of all, answer for the area A = 8.0 x 10^-10 m^2
I don't get how that was the area, i did pi r^2 and got 5.02x10^-5...