Question

There is a concrete cinder block. The outside dimensions of the block are 16 by 8 by 8. the holes are square, 6 inches on each side and go all the way through the cinder block. what is the volume of the concrete used to make the block?

You don't have the drawing, but have all the mesurements

Answer 1

We get the full brick volume, `16 \times 8 \times 8,` less the two holes of dimensions `6 times 6 times 8` so a concrete volume of

`V = 16 cdot 8 cdot 8 - 2 cdot 6 cdot 6 cdot 8 = 1024 - 2( 288) = 448` cubic inches.