Question

A thermometer graduated according to a linear scale reads a value $x_0$ when in contact with boiling water, and $x_0/3$ when in contact with ice. What is the temperature of an object in $0^{o}C$, if this thermometer in the contact with the object reads $x_0/2$?

• A. $35$
• B. $25$
• C. $60$
• D. $40$

Answer 1

Answer: (B)

$25$

$\Rightarrow T^{o}C=\frac{x_0}{6}$ & $(x_0-\frac{x_0}{3})=(100-0^{o}C)$
$x_0=\frac{300}{2}$
$\Rightarrow T^{o}C=\frac{150}{6}={25}^o$C