Find the volumes of the solids below. Homework Help ✎
cylinder with a hole
Recall the formula for the volume of a cylinder.
Cylindrical volume = (area of the base)×(height)
regular octagonal prism
Divide the octagonal base into congruent triangles to find its area.
Now use the formula (volume) = (area of the base)×(height) to find the volume of the prism.