QUESTION $3$

$3\mathrm{.}1.$ The cross section fieldbook below was observed at stakevalue $120.$ Use the observation below to calculate the reduced levels.

$(2)$

@SV$120$

$H{I}_1=,H{I}_2=$

$\backslash$table$[[\backslash$table$[[$Distance$],[$left$]],$Reading,RL$,$Remarks,$\backslash$table$[[$Distance$],[$R$]],$Reading,RL$,$Remarks$],[$CLsv$120,0,574,2114,725,,$CLsv$120,1,845,2114,725,],[-15,1,638,,,+15,0,945,,],[$Formation H$=2114,500,,,,,,]]$

$3\mathrm{.}2.$ Draw a cross section on graph sheet below using the information in $4\mathrm{.}1.$ And the following information;

$(3)$

Road design width $=12m,$ vertical scale $=1$:$100,$ Horizontal scale $=1$:$250,$ Side slope $=1$:$\frac{11}{2}$

Graph paper for cross section drawing

$6$ of $8$

$3\mathrm{.}3.$ Calculate the area of the cross$-$section above using area using the blocks if $1$ block is $5mm5mm.$

$(2)$

$3\mathrm{.}4.$ Extract the coordinates from the cross section above and calculate the area.

$(3)$