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?
A
22.5oC
B
29.0oC
C
90.0oC
D
100.0oC
Verified Correct Answer: A.
Physical Principles & Numerical Solution
20cm .... 100oC
4.5cm .... \(\theta\)
0cm ....0oC
\(\frac{4.5 - 0}{20 - 0}\) = \(\frac{0 - 0}{100 - 0}\)
\(\theta\) = 22.5oC
Source: Myschool Past Questions Archive (Record #28416)