C$($E$)/($A$)$rchE $4448$

Fall Semester $24$

Exam $11$

$3.(6)$ A concrete wall is sketched below in plan view, plus a cross section through the wall. Neither drawing is to scale. Dimensions are to the outside of the wall as follows: A: $70$ feet B: $90$ feet C:$8$ feet and the wall thickness is $1$ foot

$3$

a$.$ Find the volume of concrete in the wall.

$70(90)(8)=50400$

$(7\backslash$theta $\_(4))/(8)((90\_(4))/(8))(8+4)$

$8\mathrm{.}75,11\mathrm{.}25,8$

$=$

$887,5+$t$^(3)$

b$.(3)$ Determine the contact area of formwork for the wall

$8\mathrm{.}75(11\mathrm{.}25)=98\mathrm{.}445$

$2$