Assume two squared shaped distribution substations DSS$1($at point a$)$ and DSS$2($at point c$)$ are serving the areas A$1$ & A$2$ as shown in the figure below.

Each area $($A$1$ & A$2)$ is fed by four primary feeders with ampacity $($Maximum Carrying Current$)$ Of $200$A$.$

The primary feeders are three$-$phase four$-$wires $6\mathrm{.}93K\frac{V}{12}KV$ grounded$-$Y$.$

The feeder mains have the constant $K=0\mathrm{.}002\%$VD$/$KVA$.$mil

Assuming that loads in these areas are uniformly distributed with load density D$1=1000$KVA$/$mil ${?}^2$ and D$2=1200$KVA$/$mil ${?}^2$

Maximum load per feeder $S_1$ for the area $A1$ is:

MVA $($P$.$S: Use $3-$decimal digit precision$)$

Maximum load DSS ${?}_1$ for the area A $1$ is:

MVA $($P$.$S: Use $3-$decimal digit precision$)$

Maximum load per feeder $S_2$ for the area A $2$ is: $q,$ MVA $($P$.$S: Use $3-$decimal digit precision$)$

Maximum load $DS{S}_2$ for the area A $2$ is:

MVA $($P$.$S: Use $3-$decimal digit precision$)$

Feeder length for area A$1($Xab$)$: $q,$ mile $($P$.$S: Use $3-$decimal digit precision$)$

Feeder length for area A$2($Xcd$)$: mile $($P$.$S: Use $3-$decimal digit precision$)$

Total percent voltage drop $\%{?}_{1}V{D}_1$ for feeder main $($from point a to point b$)$:

$\%($P$.$S: Use $3-$decimal digit precision$)$

Total percent voltage drop $\%V{D}_2$ for feeder main $($from point c to point d $)$: $\%($P$.$S: Use $3-$decimal digit precision$)$