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The radius of a cone is 5 cm and its height is 12 cm. What is the slant height?

Class 9Surface Area of a ConeMensuration
  • A√119 cm
  • B17 cm
  • C60 cm
  • D13 cm

Step-by-Step Solution

= √ √(25 + 144) = √169 = 13 cm. (√119 subtracts the squares instead of adding them.)
Answer: D) 13 cm

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