On a section of a highway the speed-density relationship is linear and is given by $v=\left[80-\frac{2}{3} k\right]$; where $v$ is in $\mathrm{km} / \mathrm{h}$ and $k$ is in veh $/ \mathrm{km}$. The capacity (in veh/h) of this section of the highway would be
(A) 1200
(B) 2400
(C) 4800
(D) 9600
On a section of a highway the speed-density relationship is linear and is given by $v=\left[80-\frac{2}{3} k\right]$; where $v$ is in $\mathrm{km} / \mathrm{h}$ and $k$ is in veh $/ \mathrm{km}$. The capacity (in veh/h) of this section of the highway would be
(A) 1200
(B) 2400
(C) 4800
(D) 9600