A solid metallic right circular cylinder of base diameter 16 m and he…

Question

A solid metallic right circular cylinder of base diameter 16 m and height 2 cm is melted and recast into a right circular cone of height three times that of the cylinder. Find the curved surface area of the cone. [Use =…

Accepted Answer

Option C. 251.2 cm 2. Answer & Solution Answer: Option C Solution: Let the radius of the cone be r cm Then, & × ( 8 )^2 × 2 = 1/3 × × r^2 × 6 & r = 8 Slant height, & l = r^2 + h^2 & \,\,\, = 8^2 + 6^2 & \,\,\, = 100 & \,\,\, = 10\,cm Curved surface area of cone : & = rl & = ( 3.14 × 8 × 10 ) c m^2 &…

A solid metallic right circular cylinder of base diameter 16 m and height 2 cm is melted and recast into a right circular cone of height three times that of the cylinder. Find the curved surface area of the cone. [Use = 3.14]

Solution