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.

Answer is approx 5 cm ​

Answer 1

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