Respuesta :

9514 1404 393

Answer:

  6300 m³

Step-by-step explanation:

The volume of the pyramid is given by the formula ...

  V = 1/3s²h

where s is the side length of the square base, and h is the height.

  V = 1/3(30 m)²(21 m) = 6300 m³

The approximate volume of the pyramid is 6300 m³.