I need help with this question on my assignment.

The tungsten filament of a light bulb has a resistance of 0.0668 ohm. If the filament is 26.0 cm long, what is its diameter?

 

Have a look here:

http://www.allaboutcircuits.com/vol_1/chpt_12/5.html

 

I can only gte so far with the help of this website. I got the resistivity and found the area.

 

A=(pi*d^2)/4

where

A= area

d=diameter

 

Thank you. Your a life saver!