The distance between the lower and upper fixed points of a Fahrenheit thermometer is 90 mm. If mercury rises 30 mm above the lower fixed point, then find the corresponding temperature.
65∘F
92∘F
62∘F
60∘F
A
65∘F
B
92∘F
C
62∘F
D
60∘F
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Solution
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The scale has 90mm for a temperature difference of 180o. ∴ 30 mm corresponds to a rise of 60oF ∴ Final temperature=32o+60o=92oF
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