NET
1 He made a bronze altar, 30 feet long, 30 feet wide, and 15 feet high.
Darby
1 And he made a brazen altar: its length was twenty cubits, and its breadth twenty cubits, and its height ten cubits.
KJV
1 Moreover he made an altar of brass, twenty cubits the length thereof, and twenty cubits the breadth thereof, and ten cubits the height thereof.