B$.54\mathrm{.}4$

C$.47\mathrm{.}2$

$46\mathrm{.}2$

$(?)$

SolL

Soll:

${}_m=18\mathrm{.}2kl$

$K_i=\frac{1}{3}$

Concrete

$c=24k\frac{N}{?}$

SITUATION $3-$

Refer to Fig, EMM $15\mathrm{.}37.$

Flexible cables CF and DE brace the truss at its center pianel.

Given:

$h=4m$

$s=3m$

$W=30kN$

Find the resulting force in member $CD(kN).$

A$.7\mathrm{.}5T$

C$.15\mathrm{.}0T$

B$.15\mathrm{.}0C$

D$.7\mathrm{.}5C$