GMAT 考满分题库

Magoosh - 数学DS - 94
A certain lighthouse is a tall thin cylinder of brick, with a light chamber at the top. The brick extends from the ground to the floor of the light chamber. The brick siding of the lighthouse is in need of painting. How many square feet of brick does it have?

Statement #1: The outer diameter of the brick portion of the lighthouse is 28 ft

Statement #2: There are 274 steps from ground level to the floor of the light chamber, and each one is 8 inches high.
  • AStatement 1 ALONE is sufficient to answer the question, but statement 2 alone is NOT sufficient.
  • BStatement 2 ALONE is sufficient to answer the question, but statement 1 alone is NOT sufficient.
  • CBOTH statements 1 and 2 TOGETHER are sufficient to answer the question, but NEITHER statement ALONE is sufficient.
  • DEach statement ALONE is sufficient to answer the question.
  • EStatement 1 and 2 TOGETHER are NOT sufficient to answer the question.
显示答案
正确答案: C

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