Question : A hemispherical bowl is made of 1 cm thick steel. The inside radius of the bowl is 4 cm. The volume of the steel (in cm³) used in making the bowl is:

Option 1: $40\frac{2}{3}\pi$

Option 2: $27\frac{1}{3}\pi$

Option 3: $41\frac{1}{3}\pi$

Option 4: $35\frac{1}{3}\pi$

Question : The total surface area of a cylinder whose radius is 6 cm and height is 8 cm is: (Use $\pi=\frac{22}{7}$)

Option 1: 528 cm²

Option 2: 575 cm²

Option 3: 658 cm²

Option 4: 625 cm²

Question : If the radius of a sphere is increased by 2 cm, then its surface area increases by 352 cm². The radius of the sphere initially was: (use $\pi =\frac{22}{7}$)

Option 1: 4 cm

Option 2: 5 cm

Option 3: 3 cm

Option 4: 6 cm

Question : Find the surface area of a sphere whose radius is 3.5 cm. Use $(\left.\pi=\frac{22}{7}\right)$.

Option 1: 154 cm²

Option 2: 152 cm²

Option 3: 146 cm²

Option 4: 160 cm²

Question : The radius of a sphere is 3.5 cm. What is the total surface area of the sphere?

Option 1: 154 cm²

Option 2: 77 cm²

Option 3: 231 cm²

Option 4: 188 cm²