**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.