JAMB - Physics (1995 - No. 17)

A temperature scale has a lower fixed point of 40mm and a upper fixed point of 200mm. What is the reading on this scale when a thermometer reads 60oC?
33.3mm
36.0mm
96.0mm
136.0mm

Explanation

200mm ..... 100oC

Xmm ..... 60oC

400mm ..... 0oC

\(\frac{x - 40}{200 - 40}\) = \(\frac{60 - 0}{100 - 0}\)

X = 136mm

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