The distance between the fixed points of a centigrade thermometer is 20cm. What is the temperature when the mercury level is 4.5cm above the lower mark?
-
22.5oC
- 29.0oC
- 90.0oC
- 100.0oC
The correct answer is: A
Explanation
20cm .... 100oC4.5cm .... \(\theta\)
0cm ....0oC
\(\frac{4.5 - 0}{20 - 0}\) = \(\frac{0 - 0}{100 - 0}\)
\(\theta\) = 22.5oC