Question

A faulty thermometer has its fixed point marked as $5^{\circ}$ and $95^{\circ}$. The temperature of a body as measured by the faulty thermometer is $59^{\circ}$. The correct temperature of the body on Celsius scale is

• A. $40^{\circ}C$
• B. $60^{\circ}C$
• C. $20^{\circ}C$
• D. $30^{\circ}C$

Answer 1

Answer: (B)

Let $x$ be the temperature measured by faulty thermometer $=$
$\frac{C-0}{100}=\frac{-\text { lower fixedpoint }}{\text { number of divisions between the two fixed points }} $
or $ \frac{C}{100-0}=\frac{59-5}{95-5}$
$\frac{C}{100}=\frac{54}{90} $
$= C =60^{\circ} C$