Question

An accurate celsius scale and faulty Fahrenheit thermometer read ${65}^{\circ }C$ and ${154}^{\circ }F$ respectively when placed in a hot liquid. Find the error in the latter.

Answer 1

We know that $9C=5(F-32)$

In Celsius scale temperature is ${65}^{o}C$.

So $9\times 65=5(F-32)$

$F={149}^o$

Error in measurement $e=154-149=5^{0}F$