Question
What temperature reads the same in both the °F and °C scales? [Ans. -40]
Answer
The temperature -40 degrees Fahrenheit (-40 °F) is the same as -40 degrees Celsius (-40 °C).
To explain why this is the case, we can use the conversion formula between Fahrenheit and Celsius:
°C = (°F – 32) × 5/9
Let’s substitute -40 °F into the formula:
°C = (-40 - 32) × 5\over 9
= –72 × 5\over 9 ≈ -40
So, -40 °C is the temperature that corresponds to -40 °F, making it the temperature that reads the same on both the Fahrenheit and Celsius scales.
