Compute the area in hectares of a rectangular parcel of land whose sides are measure 6.32cm. and 7.49cm. on a map with a scale of 1:4000.
Let:
$GD_1 = L$
$GD_2 = W$
\[
MS = \frac{MD_1}{L}
\]
\[
\frac{1}{4000} = \frac{7.49cm.}{L}
\]
\[
L = 29960cm. (\frac{1m.}{100cm.})
\]
\[
L = 299.60m.
\]
\[
MS = \frac{MD_1}{W}
\]
\[
\frac{1}{4000} = \frac{6.32cm.}{W}
\]
\[
W = 25280cm. (\frac{1m.}{100cm.})
\]
\[
W = 252.80m.
\]
\[
A = L * W
\]
\[
A = 299.60m. * 252.80m.
\]
\[
A = 75738.88sqm. (\frac{1ha.}{10000sqm.})
\]
\[
A = 7.573888ha.
\]
\[
A \approx 7.574ha. \leftarrow \text{answer}
\]
