Measured the sides, in this case we can go with a circle. 476.5" around(38.7') with a 5 inch depth. Im not sure if im right? but i got around 125 sqr ft with the help of some website. Which to me seems like a lot for whats no bigger than a twin bed. But even if thats correct, how do i figure how much top soil will be needed seeing as its about 5 inches deep?
Thanks for your time.
Thanks for your time.