GATE Civil Engineering (CE) 2018 Shift 1 Solved Paper

Total weight generated by city $=40\times {10}^6$ $\mathit{k}\mathit{g}/$ year
Weight of MSW going into landfill
$=0.9\times 40\times {10}^6\mathit{k}\mathit{g}∕$ year
$=36\times {10}^6\mathit{k}\mathit{g}∕$ year
Compacted density $=550\mathit{k}\mathit{g}/{\mathit{m}}^3$
Compacted volume of MSW
Total landfill volume $=$ Volume of MSW $+$ Volume of cover
Given,
Volume of $\mathit{M}\mathit{S}\mathit{W}=0.8\times$ Total landfill volume
$\therefore$ Volume of cover $=0.2\times$ Total landfill volume
$\therefore$ Total landfill volume $=\frac{65454.5454}{0.8}$
${\mathit{m}}^3/$ year $=81818.18175{\mathit{m}}^3/\mathit{y}\mathit{e}\mathit{a}\mathit{r}$
Height of landfill $=3\mathit{m}$
$\therefore$ Area of $$ landfill $=\frac{81818.18175}{3}$
$=27272.7{\mathit{m}}^2∕$ year