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A cone (CSA = X) is placed on a cylinder (CSA = Y) of the same radius, and the cylinder's bottom (a circle of area Z) rests on the floor. The total surface area of the standing combined solid is:

Class 10Surface Area of Combined SolidsMensuration
  • AX + Y + Z
  • BX + Y
  • C
  • D

Step-by-Step Solution

Exposed surfaces are the cone's curved surface (X), the cylinder's curved surface (Y) and the cylinder's bottom circle (Z). The shared circle between cone and cylinder is hidden.
Answer: A) X + Y + Z

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