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 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 : Find the volume of a solid sphere whose diameter is 42 cm. (Use $\pi=\frac{22}{7}$)

Option 1: 38807 cm³

Option 2: 38808 cm³

Option 3: 38806 cm³

Option 4: 38805 cm³

Question : The perimeter of a minor sector of a circle of radius 5 cm is 15.5 cm. Find the area of the minor sector (use $\pi=\frac{22}{7}$ ).

Option 1: 17.53 cm²

Option 2: 13.75 cm²

Option 3: 13.57 cm²

Option 4: 17.35 cm²

Question : A solid sphere of diameter 7 cm is cut into two equal halves. What will be the increase in its total surface area?

Option 1: 77 cm²

Option 2: 60.5 cm²

Option 3: 65.5 cm²

Option 4: 55 cm²