At What Temperature Will The Centigrade Scale Be Equal To Fahrenheit Scale?

At what temperature will the centigrade scale be equal to Fahrenheit scale?

Answer: -40°

Solution/Proving:   

      

            We have to convert -40° Celsius to Fahrenheit.

°F = (-40°C × ⁹/₅) + 32
°F = -72 + 32
°F = -40°

And now we have also to convert -40° Fahrenheit to Celsius.

°C = (-40°F – 32) ⁵/₉
°C = -72 × ⁵/₉  
°C = -40°

Celsius to Fahrenheit

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