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A decorative block is a cube of edge 5 cm with a hemisphere fixed on top whose diameter equals 4.2 cm. The total surface area to paint = TSA of cube - circle of hemisphere base + curved surface of hemisphere. Find it in . (Take π = ) (CSA = curved surface area, TSA = total surface area)

Class 10Surface Area of Combined SolidsMensuration
  • A327.72
  • B163.86
  • C148.86
  • D178.86

Step-by-Step Solution

cm. TSA cube = 6*25 = 150. Base circle = π*. Hemisphere CSA = 2*π*. Total .
Answer: B) 163.86

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