Description:
The correct answer is:
✅ -40°C = -40°F
Why?
The Celsius and Fahrenheit scales intersect at -40°, making them equal at this temperature.
How to verify:
Use the conversion formula:
Plug in C=FC=F:
- x5=x−329 ⟹ x=−405x=9x−32⟹x=−40
Why Not the Others?
40°C = 104°F (not equal).
0°C = 32°F (freezing point of water, but not equal).
Fun Fact: -40° is so cold that antifreeze fails and breath freezes midair! ❄️😮