The answer which are true about the two rectangular pyramids are;
It follows from the task content that the dimensions of the rectangular prisms are the same and are as given.
On this note, it follows that the volume of the composite figure is; 1.5(9)(5) + 1.5(9)(5) = 135units³.
Read more on rectangular prisms;
https://brainly.com/question/26265930
#SPJ1