Finding Length and Area of Tungsten Wire Resistor

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Homework Statement

the actual question is
the resitivity of tungsten metal is 4.9x10to the power of -6 Ωcm. choose appropriate values for length and cross-sectional area for a home made wire resistor of resitstance 20Ω

Homework Equations

r=pl/a
r-resistance
a-cross sectional area in m squared
l- length of wire in meters
p is resistivity of the material in ohm(meters)

The Attempt at a Solution

i don't even know wher to start all i know is that i need to find L and A but i only know p's value, please help,

 

[Mindscrape]

Hello, and welcome to PF. I can't answer the poll because I don't know what it is asking. I don't, for future reference, think this problem belongs in "advanced physics."

The reason you can't "solve" this problem is because you are supposed to come up with the values yourself. You could look up the standard gauges of wire (most people use 16-26awg at the very most/least) to get a range of possible area, and from there solve for length..