MCQ
At what temperature the centigrade (Celsius) and Fahrenheit, readings are the same
- ✓$-40^{\circ}$
- B$+40^{\circ}$
- C$36.6^{\circ}$
- D$-37^{\circ}$
✓
Answer
Correct option: A.
$-40^{\circ}$
$\frac{C}{5}=\frac{F-32}{9}$
$ \Rightarrow \frac{t}{5}=\frac{t-32}{9}$
$ \Rightarrow t=-40^{\circ}$
$ \Rightarrow \frac{t}{5}=\frac{t-32}{9}$
$ \Rightarrow t=-40^{\circ}$
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