An area of \(100\,\text{m}^2\) is measured on a plan having an R.F. of \(\dfrac{1}{800}\). If the R.F. were changed to \(\dfrac{1}{2000}\), the area on the new plan in \(\text{m}^2\) would be
Show Hint
For the same ground area,
\[
\boxed{
\text{Plan area}
\propto
(\text{R.F.})^2.
}
\]