Deriving a map scale from areas

Deriving a map scale from areas

Secondary 2
TGM Original Questions

An actual area of \(180\text{ km}^2\) is represented by \(5\text{ cm}^2\) on a map.

  1. Find the scale \(1:n\).
  2. Find the map length of a \(9.42\) km trail, to 2 decimal places.
  3. Find the actual area represented by \(1.5\text{ cm}^2\).

Solution:

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Answer:(a) \(1:600000\); (b) \(1.57\) cm; (c) \(54\text{ km}^2\).

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