Q 11-10-037NEETJEE MainEasy
At what temperature do the Celsius and Fahrenheit scales give the same reading?
Answer: (D) $-40°$
$F = \dfrac{9}{5}C + 32$. Setting $F = C = x$: $x = 1.8x + 32 \Rightarrow x = -40$.
Solution by Sreeraj P, M.Sc Physics