The temperature coefficient of resistance of tungsten is `0.0045^@C^(-1)`. A standard resistance made from this material is rated to have resistance `2 Omega` but it is found that resistance is `2.115 Omega` when measured at `40^@C`. If we assume that the difference is due to unknown temperature at which resistance rating is done, then calculate this temperature.

Explanation

To solve the problem, we will use the formula for resistance as a function of temperature, which is given by:

\[ R = R_0 (1 + \alpha (T - T_0)) \]

Where:
- \( R \) is the resistance at temperature \( T \).
- \( R_0 \) is the resistance at reference temperature \( T_0 \) (which is usually taken as 0°C).
- \( \alpha \) is the temperature coefficient of resistance.
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