A stone falls from rest. The total distance covered by it in the last second of its motion is eq...

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A stone falls from rest. The total distance covered by it in the last second of its motion is equal to the distance covered in the first three seconds of its motion. How long does the stone remains in the air ?
(A) \( 4 \mathrm{~s} \)
(B) \( 5 \mathrm{~s} \)
(C) \( 6 \mathrm{~s} \)
(D) \( 7 \mathrm{~s} \)
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