Multiple choice

A table lamp is in the shape of the frustum of a right circular cone whose curved area is $1200 m^2$ and the area of the base and top is $2400 m^2$. Find the total surface area of the frustum cone.

  1. $1600 m^2$
  2. $2600 m^2$
  3. $3600 m^2$
  4. $4600 m^2$
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C Correct answer
Explanation

Total surface area = Curved surface area + Area of base + Area of top. Given CSA = 1200 and (Base + Top) = 2400. Total = 1200 + 2400 = 3600 m^2.

AI explanation

The total surface area of a frustum cone formula is the sum of its curved surface area and the areas of its two circular ends. We are given the curved surface area as 1200 square m and the combined area of the base and top as 2400 square m. Adding these gives 1200 + 2400 = 3600 square m.

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