How much time passed between Noah's flood and the Tower of Babel?
Approximately 200 years passed between Noah's flood and the Tower of Babel. About 200 years elapsed from the flood to Babel, and another 200 years from Babel to the call of Abraham. These figures are given as approximate in the context.
Les explains that the timeline runs roughly 600 years from Adam to the flood, then approximately 200 years from the flood to the Tower of Babel, and another 200 years from Babel to the call of Abraham, which is the midpoint. He notes that from Adam until Abraham God dealt with one race of people, with no organized system of worship, temple, or written law; it was based on man's conscience and a blood sacrifice offered by faith. After Noah and his three sons—Ham, Shem, and Japheth—the human race began to split into three races.