Answer
9072 lb
Work Step by Step
$V = l \times w \times h$
$V=9 ft \times 6 ft \times 4 ft = 216 ft^{3}$
Since the weight given is for one cubic foot, multiply by the volume to find the total weight.
$216 ft^3 \times 42\frac{lb}{ft^3} = 9072 lb$
