Q$45.$ During the traffic study, $25$ vehicles pass at a point on a highway in a span of $12$ minutes. The traffic flow is most nearly

a$.90$ vehicles per hour

b$.125$ vehicles per hour

c$.135$ vehicles per hour

d$.190$ vehicles per hour

Q$46.$ The method of considering more than the initial cost of a facility is called

a$.$ Annual Costing

b$.$ Carbon emission average Costing

c$.$ Modified Initial Costing

d$.$ Life$-$cycle Costing

Q$47.$ A steel bar is pulled by a $300KN$ axial force. If the bar is $13$ m long and has a diameter of $3$ cm $,$ its elongation $($Young$\text{'}$s Mod. of Steel $E=200$GPa $)$ is most nearly

a$.,1mm$

b$.,2mm$

c$.,10mm$

d$.,27mm$