At what temperature do the Celsius and Fahrenheit scales read the exact same numerical value?
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Question

At what temperature do the Celsius and Fahrenheit scales read the exact same numerical value?

Accepted Answer

Using the relation $\frac{C}{5} = \frac{F - 32}{9}$, let $C = F = x$. Then $\frac{x}{5} = \frac{x - 32}{9} \implies 9x = 5x - 160 \implies 4x = -160 \implies x = -40^\circ$. Hence, option A is correct.

Thermal Properties of Matter

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