## Elementary Technical Mathematics

$3900\ in^{2}$
To find the volume of a solid that is made up of two or more rectangular solids, find the volume of each and sum to find the total volume. The figure displayed has a height of 6 inches, two sides that measure 40 in x 5 in, and a middle section that measures 25 in x 10 in. To find volume, multiply the length, width and height of each section. $(40in \times \times 5 in \times 6 in) + (40in \times \times 5 in \times 6 in) + (25in \times \times 10 in \times 6 in) = 1200 sq\ in + 1200 sq\ in + 1500 sq\ in = 3900 sq\ in$