The figure is made of rectangular prisms what is the volume can someone explain

It is 225. Because you do the volume of one rectangular prism the equation is 15 x 3 x 3 which gives you 135. Then you do the volume of the other rectangular prism the equation is 10 x 3 x 3 which gives you 60. Then you add 135 + 90 that then gives you the total volume which is 225.

The top triangle’s volume is 15 cm • 3 cm • 3 cm which equals 135 cm^3. the bottom triangles volume is 10 cm • 3 cm • 3 cm which equals 90 cm^3. then you add them together and get 225 cm^3