Question : If the surface area of a sphere is $1386 \mathrm{~cm}^2$, then its volume is:
(Take $\pi=\frac{22}{7}$ )

Option 1: 8451 cm³

Option 2: 4851 cm³

Option 3: 5418 cm³

Option 4: 4581 cm³

Question : The volume of a sphere of radius 4.2 cm is: (Use $\pi=\frac{22}{7}$)

Option 1: 278.234 cm³

Option 2: 312.725 cm³

Option 3: 297.824 cm³

Option 4: 310.464 cm³

Question : The volume of a right circular cone is 308 cm³ and the radius of its base is 7 cm. What is the curved surface area (in cm²) of the cone? (Take $\pi=\frac{22}{7}$)

Option 1: $22 \sqrt{21}$

Option 2: $44 \sqrt{21}$

Option 3: $22 \sqrt{85}$

Option 4: $11 \sqrt{85}$

Question : A hollow sphere has an outer radius of 6 cm and inner radius of 3 cm. What is the volume of this hollow sphere?

Option 1: 252$\pi$ cm³

Option 2: 356$\pi$ cm³

Option 3: 144$\pi$ cm³

Option 4: 175$\pi$ cm³

Question : The area of the sector of a circle (in cm²) of radius 7 cm and central angle $60^{\circ}$ is: $\left(\right.$Take $\left.\pi=\frac{22}{7}\right)$

Option 1: $\frac{77}{2}$

Option 2: $77$

Option 3: $\frac{77}{3}$

Option 4: $\frac{77}{4}$