A freeway traffic stream was observed to have a density of $22\mathrm{.}0ve\frac{h}{m}\frac{i}{ln}$ when the mean speed was $55\mathrm{.}0m\frac{i}{h}.$ On another occasion at the same location, the jam density was found to be $132$ veh $\frac{?}{m}\frac{i}{\text{I}}n.$ Assume Greenshields' model of traffic flow applies. The flow rate $($in veh $\frac{?}{?}\frac{h}{ln})$ at the time when the mean speed was $55\mathrm{.}0m\frac{i}{h}$ is:

$990$

$1210$

$1540$

$2178$

None of the above