Q. At what temperature do Celsius and Fahrenheit scales show the same value?
Answer:
-40°C
Notes: The temperature at which Celsius and Fahrenheit readings are equal is -40°. This can be found by setting °C = °F and solving the equation: °C = (°C × 9/5) + 32 leads to °C = -40. Thus, -40°C equals -40°F.