A metal wire of dimeter 4mm and length 100 m has a resistacne of `0.408 Omega at 10^@ and 0.508Omega at 120^2 C` find the value of
a. temperature cofficinet of resistance
b. its resistivities of `0^@C and 120^@C`

Explanation

To solve the problem step by step, we will find the temperature coefficient of resistance and the resistivities at 0°C and 120°C.

### Step 1: Understand the given data
- Diameter of the wire = 4 mm = 0.004 m
- Length of the wire (L) = 100 m
- Resistance at 10°C (R1) = 0.408 Ω
- Resistance at 120°C (R2) = 0.508 Ω

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