The curved surface area of a cone is 4,455 cm2 and its diameter is 105 cm. What is its slant height? Take π =
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 27 cm
Curved surface area = 4,455 cm2
Diameter = 105 cm
Curved surface area of a cone = πrl
Radius = diameter/2 = 105/2 = 52.5 cm
ATQ -
4455 = (22/7) × 52.5 × l
l = 4455 × 7/(22 × 52.5)
l = 27 cm