A Fahrenheit thermometer registers ${110}^{\circ }F$ while a faulty Celsius thermometer registers ${44}^{\circ }C$. Find the error in the latter.

We are aware that a thermometer is used to determine a body's temperature. Here, both Celsius and Fahrenheit are used to express the temperature. We must translate data in Fahrenheit to Celsius and then calculate their difference in order to determine the mistake in the Celsius scale.

A thermometer that measures temperature in the three separate scales of Kelvin, Fahrenheit, and Celsius is typically used to determine how hot or cold an object is. The most popular scale for measuring temperature is the Celsius scale. Using straightforward mathematics, we can simply translate from one scale to another as well.

$\mathrm{Correct} \mathrm{reading} \mathrm{for} {110}^0\mathrm{F} \mathrm{in} \mathrm{Celsiius} \mathrm{scale} \mathrm{is}$

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

$\frac{110-32}{9}=\frac{C}{5}$

$\mathrm{Solving} \mathrm{C}=43.{33}^0\mathrm{C}$

$\mathrm{correction} \mathrm{should} \mathrm{be}$

$44-43.33=0.{67}^0\mathrm{C}$

Hence, option A is correct.