A cylinder with radius 2 cm and height 8 cm is full of water. A second cylinder of radius 4 cm and height 8 cm is empty. If all of the water is poured from the first cylinder into the second cylinder, the depth of the water in the second cylinder will be
(A) 1 cm (B) 2 cm (C) 3 cm (D) 4 cm (E) 6 cm
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