Answer
$21$
Work Step by Step
Step 1. Assume $B\ $ is a person’s BMI.
Step 2. Assume $w\ (lb)$ is the weight of the car and $h\ (in)$ is the height.
Step 3. From the given conditions, we have $B=kw/h^2$ and $24=k(177)/(6\times12)^2$, thus $k=\frac{24(72)^2}{177}$
Step 4. For $w=130\ (lb)$, $h=66\ (in)$, we have $B=kw/h^2=\frac{24(72)^2}{177}\times\frac{130}{66^2}\approx21$
