Question : The slant height and the radius of a right circular cone are 11 cm and 6 cm, respectively. What is the curved surface area of the cone?

Option 1: $74 \pi\; {cm}^2$

Option 2: $60 \pi \;{cm}^2$

Option 3: $44 \pi\; {cm}^2$

Option 4: $66 \pi \;{cm}^2$

Question : Find the curved surface area of a cone whose radius of the base is 7 cm and slant height is 8 cm. [Use $\pi=\frac{22}{7}$]

Option 1: 132 cm²

Option 2: 198 cm²

Option 3: 154 cm²

Option 4: 176 cm²

Question : The surface area of a sphere is 2464 cm². Find the radius of the sphere. [Use $\pi=\frac{22}{7}$ ]

Option 1: 14 cm

Option 2: 28 cm

Option 3: 42 cm

Option 4: 40 cm

Question : The curved surface area is thrice as big as the base area of a cone. If the diameter of the cone is 1 cm. Then what is the total surface area (in cm²) of the cone?

Option 1: $\pi$

Option 2: $3\pi $

Option 3: $2\pi$

Option 4: $4\pi $

Question : The volume of a right circular cone is 3080 cm³. If the radius of its base is 7 cm, then what is the height of the cone? $\left[\right.$ Use $\left.\pi=\frac{22}{7}\right]$

Option 1: 60 cm

Option 2: 80 cm

Option 3: 120 cm

Option 4: 90 cm