A retaining wall $7\mathrm{.}75m$ high, retains a cohssionless backfill. The top

$(h_1=2\mathrm{.}75(m))$ has a unit weight of $(g_1=18K\frac{N}{m^3})$ and internal angle of

friction $)$ and the rest has a unit weight of $)$ with

$\{$:$f_2=21C).$

$1-$ The total active thrust pressure per meter run of the retaining wall $P_a$

is equal to $------KN.$

$379\mathrm{.}78KN$

$539\mathrm{.}01KN$

$149\mathrm{.}47KN$

$420\mathrm{.}98KN$

$284\mathrm{.}7$KN

A retaining wall $7\mathrm{.}75m$ high, retains a cohssionless backfill. The top

$(h_1=2\mathrm{.}75(m))$ has a unit weight of $(g_1=18K\frac{N}{m^3})$ and internal angle of

friction $(f_1=33C)$ and the rest has a unit weight of $(g_2=25K\frac{N}{m^3})$ with

$\{$:$f_2=21C).$

$2-$ The height of the point of application of this thrust above the base of

the wall is equal to

$2\mathrm{.}309m$

$0\mathrm{.}176m$

$0\mathrm{.}842m$

$0\mathrm{.}601m$

$1\mathrm{.}682m$