Question

The temperature which has same numerical value on Celsius and Fahrenheit scale is then

• A. 273
• B. -273
• C. -40
• D. 40

Answer 1

The correct option is C -40

The linear equation is

$F=\frac{9}{5}C+32$. . . . . .(1)

Lets consider

A) $C={273}^{0}C$

From equation (1)

$F=\frac{9}{5}\times 273+32={523.4}^{0}F$

Wrong option.

B) $C=-{273}^{0}C$

$F=-\frac{9}{5}\times 273+32=-{459.4}^{0}F$

Wrong option.

C) $C=-{40}^{0}C$

$F=-\frac{9}{5}\times 40+32=-{40}^{0}F$

Correct option.

D) $C={40}^{0}C$

$F=\frac{9}{5}\times 40+32={104}^{0}F$

The correct option is C.