Question

The temperature as measured by the thermometer shown here will be:

• A. ${84}^{o}C$
• B. ${86}^{o}C$
• C. ${88}^{o}C$
• D. ${90}^{o}C$

Answer 1

The correct option is A ${84}^{o}C$

The main scale reading of the thermometer reads ${80}^{o}C$

The subscale has 5 divisions in between a range of ${10}^{o}C$

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

Therefore reading of the thermometer is ${80}^{o}C+2\times 2^{o}C={84}^{o}C$