The lower and upper fixed point of a thermometer are 30mm and 180mm respectively. Calculate the temperature in degrees Celsius when the thermometer reads 45mm
-
10.0oC
- 15.0oC
- 20.0oC
- 30.0oC
The correct answer is: A
Explanation
100....180A......45
0......30
\(\frac{45 - 30}{180 - 30} = \frac{A - 0}{100 - 0}\)
A = \(\frac{15 \times 100}{150} = 10^oC\)