Question : The curved surface area of a right circular cone is 44 cm². If the slant height of the cone is 7 cm, then find the radius of its base. [Use $\pi=\frac{22}{7}$ ]

Option 1: 2 cm

Option 2: 4 cm

Option 3: 3 cm

Option 4: 5 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 : 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 : What will be the curved surface area of a cone of radius 5 cm and a slant height of 30 cm? (Use $\pi=3.14$)

Option 1: 234 m²

Option 2: 715 m²

Option 3: 543 m²

Option 4: 471 cm²

Question : The height of a right circular cone is 24 cm. If the diameter of its base is 36 cm, then what will be the curved surface area of the cone?

Option 1: $1444.6 \; \mathrm{cm^2}$

Option 2: $2400.9\; \mathrm{cm^2}$

Option 3: $1697.14 \; \mathrm{cm^2}$

Option 4: $2144.2\; \mathrm{cm^2}$