Disagree. You overlooked the thickness of the rim. The 30-cubit
circumference is an outside measurement (O.D.); the 10-cubit diameter is
an inside measurement (I.D.). If the rim was about 1-inch thick, I
think the measurements will work to whatever precision is required to
preserve the integrity of the text.
The most common sound we will hear in heaven will probably be the sound
of OEC's slapping their palms against their forehead and saying, "Why
didn't I think of that." :-) Just *kidding* folks, we'll *all* be
slapping our heads. The really sad sight will be, on the Day of
Judgement, observing the moment of truth hitting those who rejected the
truth of God, thereby sentencing themselves to eternal separation from
His love.
God Bless,
Bill