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Calculate the length which corresponds to a temperature of 20°C if the ice and ...


Question

Calculate the length which corresponds to a temperature of 20°C if the ice and steam points of an ungraduated thermometer are 400 mm apart

Options

A) 60mm

B) 30mm

C) 20mm

D) 80mm


The correct answer is D.

Explanation:

\(\cfrac{100}{20}=\cfrac{400}{x}\)
\(100x=20 \times 400\) (cross multiply)
\(x=\cfrac{8000}{100}\)
\(x=80\)mm

Explanation provided by Jb-light


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Discussion (2)

  • Adelowo

    the question should read 20 degrees not 200

  • Jb-light

    \(\cfrac{100}{20}=\cfrac{400}{x}\)
    \(100x=20 \times 400\) (cross multiply)
    \(x=\cfrac{8000}{100}\)
    \(x=80\)mm