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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

A) 60mm

B) 30mm

C) 20mm

D) 80mm

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

Discussion (2)

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