A body dropped from the top of a tower covers a distance \( 7 x \) in the last second of its jou...

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A body dropped from the top of a tower covers a distance \( 7 x \) in the last second of its journey, where \( x \) is the distance covered in the first second. How much time does it take to reach the ground?
(1) \( 3 \mathrm{~s} \)
(2) \( 4 \mathrm{~s} \)
(3) \( 5 \mathrm{~s} \)
(4) \( 6 \mathrm{~s} \)
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