Question

A manufacture marks the thermometer wrongly.So At $0^{\circ }C$ it reads ${10}^{\circ }C$, at ${100}^{\circ }C$ it reads ${85}^{\circ }C$. Then the reading at ${50}^{\circ }C$ will be :

• A. ${40}^{\circ }C$
• B. ${32.5}^{\circ }C$
• C. ${37.5}^{\circ }C$
• D. ${42.5}^{\circ }C$

Answer 1

Answer: (C)

${37.5}^{\circ }C$

At $0^{o}C$ there is a difference of ${10}^{o}C$
At ${100}^{o}C$ there is a difference of ${15}^{o}C$
Hence, at ${50}^{o}C$ there should be a difference of ${12.5}^{o}C$ i.e. 50-12.5= ${37.5}^{o}C$