A temperature scale has a lower fixed point of 40mm and a upper fixed point…

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?
  • A.
    33.3mm
  • B.
    36.0mm
  • C.
    96.0mm
  • D.
    136.0mm
Correct Answer: Option D
Explanation

200mm ….. 100oC
Xmm ….. 60oC
400mm ….. 0oC
(frac{x – 40}{200 – 40}) = (frac{60 – 0}{100 – 0})
X = 136mm

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