Question: How long did it take to build Noah’s Ark, and where can I find the answer?
Answer: In 1 Peter 3:19,20 we read,
"By which also he (Christ) went and preached unto the Spirits in prison. (19) "Which sometime were disobedient, when once the longsuffering of God WAITED in the days of Noah, WHILE THE ARK WAS A PREPARING, wherein few, that is, eight souls were saved by water." (20)
Now, notice Genesis 6:3,
"And the Lord said, My spirit shall not always strive with man...yet his days shall be an hundred and twenty years."
God’s longsuffering was for the 120 years it took Noah to complete the ark; and then, God’s judgment of the flood came.
In 1 Peter 3:19, Christ preached through Noah just as He uses the Christians, today, who are His ambassadors. (2 Corinthians 5:20). God describes the people Noah preached to in Genesis 6:5,
"...every imagination of the thoughts of his heart was only evil continually."
They were prisoners to their own sin. The word prison is the Greek "phulake" and is never—anywhere in the New Testament—used in reference to Hell, or translated as such.
This alone disproves the false claim of some that, "After you die and are in Hell, you get a second chance." That is exactly what Satan would like you to believe! Read Luke 16:19-31. Perhaps this man in Hell believed Satan’s lie that he would have a second chance; but, found out too late that he had been deceived.
When you die, your destiny is sealed forever. That is why the Lord stated,
"...behold, now is the accepted time; behold, now is the day of Salvation." (2 Corinthians 6:2).
"It is a fearful thing to fall into the hands of the living God."
...without Christ as your Savior. (Hebrews 10:31).
God destroyed millions during the flood, the multitude who didn’t believe. You can follow the multitude into Hell, or the minority into eternal life. It is your choice. John 3:36 makes it perfectly clear,
"He that believeth on the Son hath everlasting life: and he that believeth not the Son shall not see life; but the wrath of God abideth on him."