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Q:

A solid metallic sphere of radius x cm is melted and then drawn into 126 cones each of radius 3.5 cm and height 3 cm. There is no wastage of material in this process. What is the value of x?

  • 1
    10.5
  • 2
    3.5
  • 3
    7
  • 4
    21
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Answer : 1. "10.5"

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