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There is a cone container that contains some water (as shown in the figure). H = 4R. The water flows out at the speed of q. How long does all of the water flow out?

1: The distance between water surface and cone vertex is h.

2: The radius of the water surface is r.
  • AStatement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
  • BStatement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
  • CBoth statements TOGETHER are sufficient, but NEITHER one ALONE is sufficient.
  • DEACH statement ALONE is sufficient.
  • EStatements (1) and (2) TOGETHER are NOT sufficient.
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正确答案: D

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