The curved surface area of frustum cone is 1,200 cm. The diameter of a cone is 50 and 12 cm. Find the slant height. (Use π = 3).
Curved surface area = π(R + r)s
Diameter = radius ×2
Radius, R = 25 cm, r = 6 cm
1,200 = 3×(25+6)×s
1,200 = 3×(31)×s
1,200/93 = s
Slant Height = 12.90 cm