The ratio of the base area of a hollow cone to that of its curved…

The ratio of the base area of a hollow cone to that of its curved surface is 1:4. If its base radius is 7cm, calculate the slant height of the cone
  • A.
    7cm
  • B.
    22cm
  • C.
    28cm
  • D.
    49cm
  • E.
    154cm
Correct Answer: Option C
Explanation
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