2025 CCHY PRELIMS P1 Q9

An area of \(1\text{ km}^2\) is represented by \(4\text{ cm}^2\) on a map.

1. Calculate, in \(\text{km}^2\), the actual area of a volcanic crater which is represented by a circle of area \(0.3\text{ cm}^2\) on the map.[1]
2. Find the scale of the map in the form \(1:n\).[2]