Respuesta :

Answer:

240 m

Step-by-step explanation:

To find the volume of a rectangular prism, multiply its 3 dimensions: length x width x height. The volume is expressed in cubic units.

Length: 12 m

Width: 5 m

Height: 4 m
Step 1 - Find the volume of the cube. 12 x 5 x 4 = 240m^3
Step 2 - Find the volume of the prism. ((3x4)/2) x 12 = 72m^3
Step 3 - Add the volumes. 240+72=312m^3