(Solved): A section of highway is known to have a free-flow speed of 55mi/h and a capacity of 3300 veh/h. In ...

A section of highway is known to have a free-flow speed of $$55\mathrm{mi}/\mathrm{h}$$ and a capacity of 3300 veh/h. In a given hour, 2100 vehicles were counted at a specified point along this highway section. If the linear speed-density relationship applies, what would you estimate the space-mean speed of these 2100 vehicles to be?