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
Correct Answer: Option A
Explanation
20cm …. 100oC
4.5cm …. (theta)
0cm ….0oC
(frac{4.5 – 0}{20 – 0}) = (frac{0 – 0}{100 – 0})
(theta) = 22.5oC