A) \[-48{}^\circ \]
B) \[-40{}^\circ \]
C) \[37{}^\circ \]
D) \[40{}^\circ \]
Correct Answer: B
Solution :
The relation between the Centigrade and Fahrenheit scale of temperature is \[\frac{C}{5}=\frac{5-32}{9}\] Suppose, x be the temperature at which Centrigrade and Fahrenheit scales are equal. Hence, \[\frac{x}{5}=\frac{x-32}{9}\] \[9x=5x-160\] \[4x=-160\] \[x=-{{40}^{o}}\]
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