KJV:
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.
NASB:
"This is how you shall make it: the length of the ark three hundred cubits, its breadth fifty cubits, and its height thirty cubits.
KJV:
A window shalt thou make to the ark, and in a cubit shalt thou finish it above; and the door of the ark shalt thou set in the side thereof; with lower, second, and third stories shalt thou make it.
NASB:
"You shall make a window for the ark, and finish it to a cubit from the top; and set the door of the ark in the side of it; you shall make it with lower, second, and third decks.
KJV:
Fifteen cubits upward did the waters prevail; and the mountains were covered.
NASB:
The water prevailed fifteen cubits higher, and the mountains were covered.
KJV:
And they shall make an ark of shittim wood: two cubits and a half shall be the length thereof, and a cubit and a half the breadth thereof, and a cubit and a half the height thereof.
NASB:
"They shall construct an ark of acacia wood two and a half cubits long, and one and a half cubits wide, and one and a half cubits high.