Answer:
(√18.75 / 3) * 110.25
Explanation:
So if the perimeter of the base is 42, then each side is equal to 10.5
If you draw the height from the peak of the pyramid, you will have a right triangle. One of the sides is 5.5, and the hypotenuse is 7.
The height will be √18.75
The total volume is equal to the base times the height / 3
The area of the base is 110.25.
The height / 3 = √18.75 / 3
The total volume is (√18.75 / 3) * 110.25
This might not be right so check my steps.