Question

What is the measurement of temperature in Celsius scale in the above figure?

• A. ${25}^{o}C$
• B. ${30}^{o}C$
• C. ${26}^{o}C$
• D. ${29}^{o}C$

Answer 1

The correct option is B ${30}^{o}C$

The main scale reading of thermometer reads ${30}^{o}C$ and sub scale reading is zero.

the sub scale reading has 5 division on it and between them it has ${10}^o$

Hence each division measures about $\frac{{10}^o}{5}=2^o$

Therefore reading of thermometer is ${30}^{o}C+0\times 2^o={30}^{o}C$