Question

At what temperature the centigrade ( Celsius ) and Fahrenheit, readings are the same

• A. $-{40}^0$
• B. $+{40}^0$
• C. ${45}^0$
• D. None of these

Answer 1

The correct option is A $-{40}^0$

The Relation between celsius and farenhite is given by

$\frac{C}{5}=\frac{F-32}{9}$

$\Rightarrow \frac{t}{5}=\frac{t-32}{9}\Rightarrow t=-{40}^{\circ }C$