Question $1$

$1\mathrm{.}1$ Define the term "earthworks":

$(3)$

$12$ A contractor has excavated a $420m$ long trench with an average woth of $14\mathrm{.}5$A and longitudinal section as follows:

$L=6700E$

The following rates of payment are applicable:

Soft material

$.$ Soft material excavation, excavation depth $0$ to $0,5m$ below natural ground level: R$60$ per $m^3$

Soft material excavation, excavation depth $>0,5m$ to $22,5m$ below natural ground Aevel: R$7$Oner $m^3$

Intermediate material

Intermediate excavation, excavation depth $0$ to $1\mathrm{.}2m$ below natural ground level: R$75$ per $m^3$

Intermediste excavation, excavation depth $>1\mathrm{.}2m$ to $3\mathrm{.}0m$ below natural ground level: R$88$ per $m^3$

Hard material

Herd exravation, excavation depth $0$ to $1\mathrm{.}5m$ below natural ground level: $R110$ per $m^2$

Hard excavation, excavation depth exceeding $1\mathrm{.}5m$ below natural ground level: R$130$ per $m^3$

Calradaie the payment due to the contractor for excavatipn of the trench.

$(10)$