You're still reaching. It said thirty cubits compassed it around, not a phrase one would use for an internal circumference. You can't claim ten cubits from brim to brim is an outside measurement, and thirty cubits is an inside measurement, wthout special pleading. So give it up.
You just can't stand it that this verse may just be true, can you?
And you REFUSED to answer my question! How many cubits is the usable circumference of the bowl, Prof?
If the thickness is a hand's breadth as is shown in the subsequent verse, then what is the usable circumference of the bowl?
You can ridicule me all you want, but just answer the question first.