The distance between the fixed points of a centigrade the...
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
29.0oC
100.0oC
Correct answer is A
20cm .... 100oC
4.5cm .... θ
0cm ....0oC
4.5−020−0 = 0−0100−0
θ = 22.5oC