A rectangular plot of 16 km2 in area is shown on a map by a similar rectangular area of 1 cm2. R.F of the scale to measure a distance of 40 km will be
1
\(\frac{1}{{16000}}\)
2
\(\frac{1}{{400}}\)
3
\(\frac{1}{{1600}}\)
4
\(\frac{1}{{400000}}\)
A rectangular plot of 16 km2 in area is shown on a map by a similar rectangular area of 1 cm2. R.F of the scale to measure a distance of 40 km will be