ASSESSMENT TASK $4$: VOLUMES

A grid leveling was performed on a piece of land $(1020m)$ as shown in figure below. The readings were taken at the grid corners $(55m).$ Required:

a$-$ Complete the leveling table and find the levelling error.

b$-$ Calculate the volume of earth to be excavated assuming, excavation has vertical side and the site is to be excavated to a reduced level of $57\mathrm{.}5m.$

c$-$ Calculate the cost of removal soil using trucks of $10$ cubic metre considering that the soil has the ability to bulk $20\%$ after it is removed and the cost is $$800$ per truck to remove the soil.

$\backslash$table$[[$Point$,$BS$,$IS$,$FS$,$HI$,$RL $($m$),$Remarks$],[$BM$,0\mathrm{.}50,,,,60\mathrm{.}00,],[$A$1,,3\mathrm{.}60,,,56\mathrm{.}9,],[$A$2,,3\mathrm{.}20,,,57\mathrm{.}3,],[$A$3,,2\mathrm{.}80,,,57\mathrm{.}7,],[$A$4,,2\mathrm{.}20,,,58\mathrm{.}3,],[$A$5,,1\mathrm{.}60,,,58\mathrm{.}9,],[$B$5,,2\mathrm{.}30,,,58\mathrm{.}2,],[$B$4,,2\mathrm{.}20,,,58\mathrm{.}3,],[$B$3,,2\mathrm{.}00,,,58\mathrm{.}5,],[$B$2,,0\mathrm{.}10,,,60\mathrm{.}4,],[$B$1,,1\mathrm{.}30,,,59\mathrm{.}2,],[$C$1,,1\mathrm{.}50,,,59,],[$C$2,,1\mathrm{.}90,,,58\mathrm{.}6,],[$C$3,,2\mathrm{.}70,,,57\mathrm{.}8,],[$C$4,,2\mathrm{.}90,,,57\mathrm{.}6,],[$C$5,,3\mathrm{.}20,,,57\mathrm{.}3,],[$BM$,,,0\mathrm{.}50,,60\mathrm{.}0,]]$