Answer:
468
Step-by-step explanation:
The volume of a cube is V = s³. Fin the volume of each cube separately and add together for the volume all together.
The small cube has side length 5 so V = 5³ = 125.
The large cube has side length 7 since 12 - 5 = 7. So V = 7³ = 343.
Together the volume is 125 + 343 = 468