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A conical heap of grain has base radius 12 m and height 5 m. What area of tarpaulin is needed to just cover the heap? (π = 3.14)

Class 9Surface Area of a ConeMensuration
  • A
  • B
  • C
  • D

Step-by-Step Solution

= √ m. Only the sloping surface is covered: . (376.80 uses h; 942.00 also counts the ground under the heap.)
Answer: A)

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