The drag coefficient for a car with a frontal area of $26f{t}^2$ is being measured in a $8ft8ft$ wind tunnel. The density of air under the test conditions is $2\mathrm{.}4{10}^{-3}$ slugs $\frac{?}{f{t}^3},$ When the air flow rate is$,500,000f\frac{t^3}{m}in,$ the drag force on the car was measured to be $170$ lb $.$ The drag coefficient under the test conditions is most nearly

$0\mathrm{.}28$

$0\mathrm{.}30-$ not the answer

$0\mathrm{.}32$

$0\mathrm{.}34$