The lower and upper fixed points of a mercury-in-glass thermometer are marked X and 180...

NECO 2001

The lower and upper fixed points of a mercury-in-glass thermometer are marked X and 180 mm respectively. On a particular day the mercury meniscus in the thermometer rises to 60mm. If the corresponding reading on a Celsius scale is 20 ° C, what is the value X?

A. 6.0mm
B. 18.0mm
C. 30.0mm
D. 60.0mm
E. 120.0mm

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Correct Answer: Option C

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