-40 degrees Fahrenheit is equal to how many degrees on the Celsius scale?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. –40.
-40 degrees Fahrenheit is exactly equal to -40 degrees Celsius. This is the unique point where both temperature scales intersect and show the same numerical value. The conversion formula between the two scales is:
°C = (°F − 32) × 5⁄9.
Applying it:
(-40 − 32) × 5⁄9 = (-72) × 5⁄9 = -40°C.
This temperature is extremely cold and often used as a reference point in scientific and weather-related discussions to compare the scales.