Multiple choice

A circular cone with a base radius of 2 m has a surface area of 62.80 m2. What is its slant height?

  1. 28 m

  2. 18 m

  3. 8 m

  4. 4 m
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C Correct answer
AI explanation

Using the total surface area formula for a cone, the surface area equals pi times r times (l + r), where r is the base radius and l is the slant height. Substituting the given values, we get 62.80 = 3.14 times 2 times (l + 2). This simplifies to 62.80 = 6.28 times (l + 2), so l + 2 = 10 and the slant height is 8 m.

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