Situation $10-$ A small bridge with a span of $120m$ is suspended on a parabolic cable. The design load is $12kN$ per $m.$ The cable diameter is $100mm$ with allowable tensile stress of $180$MPa.

$34.$ Determine the tensile capacity $(kN)$ of the cable.

A$.1632\mathrm{.}5$

C$.1555\mathrm{.}5$

B$.1413\mathrm{.}7$

D$.1123\mathrm{.}6$

$35.$ Which of the following gives the smallest cable sag $($m$)$ to support the load.

A$.17\mathrm{.}8$

C$.21\mathrm{.}6$

B$.15\mathrm{.}2$

D$.23\mathrm{.}4$

$36.$ If the sag is $20m,$ what is the tension $(kN)$ at the lowest point of the cable?

A$.1180$

C$.1230$

B$.920$

D$.1080$