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Ex 13.7, 4 - If the volume of a right circular cone of - Volume Of Cone

  1. Chapter 13 Class 9 Surface Areas and Volumes
  2. Serial order wise
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Ex 13.7, 4 If the volume of a right circular cone of height 9 cm is 48 π cm3, find the diameter of its base. Height of cone = h = 9 cm Let radius of cone = r cm Given Volume of cone = 48 π cm3 1/3 πr2h = 48π 1/3 πr2 × (9) = 48π "π" 𝑟23="48π" r2 = (48𝜋 )/3𝜋 r2 = 16 r = √16 r = √((4)2) r = 4 cm Diameter = 2 × Radius Thus, the diameter of the base of cone is 8 cm.

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