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    Question

    The temperature which has the same reading on both

    Fahrenheit and Celsius scales is –
    A 40° Correct Answer Incorrect Answer
    B -40° Correct Answer Incorrect Answer
    C -34° Correct Answer Incorrect Answer
    D -140' Correct Answer Incorrect Answer

    Solution

    If C is the temperature in Celsius and F is the temperature in Fahrenheit then, C/S = (F-32)/9. They are equal at -40° (minus 40 degrees), because if we convert the readings of Celsius and Fahrenheit, we will have: Celsius to Fahrenheit (-40°C x 9/5) +32 = -72 + 32 = -40°F. Fahrenheit to Celsius (-40°F - 32°) x 5/9 = (-72) x 5/9 = -40°C.

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