Question

The steam point and the ice point of a mercury thermometer are wrongly marked as ${92}^{o}C$ and $2^{o}C$ respectively. The correct temperature read by this thermometer is:

• A. 2${}^o$C
• B. 5${}^o$C
• C. 10${}^o$C
• D. 20${}^o$C

Answer 1

The correct option is D 20${}^o$C

$\frac{x-2}{92-2}=\frac{c-0}{100-0}$

Temperature measued by this thermoomeeter = ${20}^{\circ }$

$=\frac{20-2}{90}=\frac{c}{100}$

$c={20}^{\circ }c$

Hence (D) is correct answer