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Q: The height of a solid cylinder is 40 cm, and the diameter of its base is 10 cm. Two identical conical holes, each of radius 5 cm and height 12cm, are drilled out. What is the surface area (in cm²) of the remaining solid?
  • A. 530𝛑
  • B. 390𝛑
  • C. 450𝛑
  • D. 480𝛑
Correct Answer: Option A -
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Explanations:

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