Multiple choice

A vessel is in the form of a frustum of a cone. The area of the ends of the frustum cone are $122$ $cm^2$ and $205$ $cm^2$. If the curved surface area is $305$ $cm^2$. Find the total surface area.

  1. $613$ $cm^2$
  2. $632$ $cm^2$
  3. $620$ $cm^2$
  4. $640$ $cm^2$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Total surface area = Curved surface area + Area of top + Area of bottom = 305 + 122 + 205 = 632.

AI explanation

The total surface area of a frustum is the sum of its curved surface area and the areas of its two circular ends. Adding the given values gives 305 + 122 + 205. The sum is 632 cm^2.

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