Answer:volume of regular pyramid = 3388 units³
Step-by-step explanation:Volume of regular pyramid can be calculated using the following rule:
volume of regular pyramid =

* area of base * height
volume of regular pyramid =

* length * width * height
Based on the comment you added above, we have:
length = 11 units
width = 11 units
height = 84 units
Substitute with the givens in the above equation to get the volume as follows:
volume =

* 11 * 11 * 84
volume = 3388 units³
Hope this helps :)