Question

What is the volume of a rectangular crate that has dimensions 8 inches by 8 inches by 1 1/4 feet? 80 in.3 1,024 in.3 960 in.3 31 in.

Answer 1

in plain and short, is just their product.

now, let's convert the mixed fractions to "improper" firstly, and then multiply.

$\bf \stackrel{mixed}{1\frac{1}{4}}\implies \cfrac{1\cdot 4+1}{4}\implies \stackrel{improper}{\cfrac{5}{4}} \\\\\\ 8\cdot 8\cdot \cfrac{5}{4}\implies \cfrac{8\cdot 8\cdot 5}{4}\implies \cfrac{320}{4}\implies 80$