What is the volume of the regular pyramid below?

For this case we have by definition that the volume of the pyramid shown is given by:

Where:

Is the area of the base of a square

h: It's the height

According to the data of the figure shown we have:

Substituting:

Option D

The correct answer is option D.  2700 units²

Step-by-step explanation:

Formula:-

Volume of pyramid = (a²h)/3

Where a -  side of base

h - height of pyramid

To find the volume of pyramid

Here base side = 10 units and h = 81 units

Volume = (a²h)/3

 = (10² * 81)/3 = 8100/3 = 2700  units²

Therefore the correct answer is option D.  2700 units²