15 This is how you are to build it: The ark is to be three hundred cubits long, fifty cubits wide and thirty cubits high.a

Read Genesis 6:15 Using Other Translations

And this is the fashion which thou shalt make it of: The length of the ark shall be three hundred cubits, the breadth of it fifty cubits, and the height of it thirty cubits.
This is how you are to make it: the length of the ark 300 cubits, its breadth 50 cubits, and its height 30 cubits.
Make the boat 450 feet long, 75 feet wide, and 45 feet high.