en_tn_lite_do_not_use/2ch/04/03.md

twenty cubits ... ten cubits ... five cubits ... thirty cubits ... each cubit

A cubit is 46 centimeters. Alternate translation: "9.2 meters ... 4.6 meters ... 2.3 meters ... 13.8 meters ... every 46 centimeters" (See: rc://en/ta/man/translate/translate-bdistance)

ten to each cubit

"ten per cubit"

when the sea itself was cast

This can be stated in active form. Alternate translation: "when the workers cast the sea itself" (See: rc://en/ta/man/translate/figs-activepassive)