Situation $8.$ Data of a beam section is given below.

$BH=300mm550mm$

Bar diameter $=20mm$

Clear concrete cover $to10mm$

diameter ties $=40mm$

Concrete $f_{c^{\text{'}}}=35$MPa

Steel $f_{y1}=420$MPa

$=0\mathrm{.}90$

The beam is simply supported with a span of $6$ m $.$ It will carry a $12k\frac{N}{m}$ total factored dead load and two $42$ kN factored live load at $3^{rd}$ points. Use NSCP $2015$ in designing the beam.

$22.$ Which of the following most nearly gives the critical factored moment $($kNm$).$

A$.111$

C$.121$

B$.90$

D$)138$

$23.$ Which of the following most nearly gives the required tension reinforcement area $(m{m}^2).$

A$.547$

C$.564$

B$.578$

D$.774$

$24.$ Determine the required number of tension bars.

A$.2$

C$.4$

$3.3$

D$.5$