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A road map has a scale of 1 : 30 000
The length of a road on the map is 7 cm.
Work out the length, in kilometres, of the real road. *
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Answer: 2.1 km

Step-by-step explanation:

Given

A road map has a scale of  [tex]1:30,000[/tex]

The length of road on the map is [tex]7\ cm[/tex]

The ratio of length on the map to the length on road is 1:30,000

Suppose x is the length of real road

[tex]\Rightarrow \dfrac{7}{x}=\dfrac{1}{30,000}\\\Rightarrow x=30,000\times 7\ cm\approx 2.1\ km[/tex]

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