The lower and upper fixed point of a thermometer are 30mm and 180mm respectively. Calculate...

WAEC 2005

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

A. 10.0^oC
B. 15.0^oC
C. 20.0^oC
D. 30.0^oC

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Correct Answer: Option A

Explanation

100....180
A......45
0......30

\(\frac{45 - 30}{180 - 30} = \frac{A - 0}{100 - 0}\)

A = \(\frac{15 \times 100}{150} = 10^oC\)

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The lower and upper fixed point of a thermometer are 30mm and 180mm respectively. Calculate...

Correct Answer: Option A

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