Question

At what temperature will both celsius and fahrenheit scales read the same value?

• A. ${100}^{\circ }$
• B. ${180}^{\circ }$
• C. ${40}^{\circ }$
• D. $-{40}^{\circ }$

Answer 1

The correct option is D $-{40}^{\circ }$

As we know, $\frac{F-32}{180}=\frac{C}{100}$

Let at t temp both show the same value. Then,

$t-32=\frac{9t}{5}$

$t=-{40}^{\circ }$