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Find the radius of base of a cone whose curved surface area is 1884.4 square meter and it's slant height is 12 cm.Answer is approx 5 cm ​

Answer»

  1. Question⇒  find the RADIUS of base of a cone whose curved surface AREA is 1884.4 square meter and it's SLANT height is 12 cm.

Step-by-step explanation:

  • given the slant height of the cone is 12cm =
  • CSA of the cone = 1884.4m² = 18844000cm²
  • we KNOW the formula for the CSA of the cone, that is πrl where r is the radius of the base of the cone and l is the slant height of the cone.
  • therefore πrl = 18844000cm²
  • >> 22/7 × r × 12 = 18844000m²
  • >> 12 × r = 18844000/1 × 7/22
  • >> 12 × r = 5995818.18
  • >> r = 5995818.18/12
  • >> r = 499651.515 cm
  • hence, the radius of the cylinder is 499651.515 cm.                          
  • Answer is approx 5 cm


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