Q94
General ScienceChemistry
At what temperature, Celcius and Fahrenheit readings will be same?
- a.$+40°$
- b.$+20°$
- c.$-20°$
- d.$-40°$
Answer: (D) $-40°$
Using the conversion formula $C = \frac{5}{9}(F - 32)$. Setting C = F = x: $x = \frac{5}{9}(x - 32)$ → $9x = 5x - 160$ → $4x = -160$ → $x = -40$. So both scales read $-40°$ at this unique crossover point.