Question : The sum of the curved surface area and the total surface area of a solid cylinder is 2068 cm². If the radius of its base is 7 cm, then what is the volume of this cylinder? (use $\pi=\frac{22}{7}$)

Option 1: 2060 cm³

Option 2: 2480 cm³

Option 3: 3080 cm³

Option 4: 2760 cm³

Question : The volume of a cylinder is 4312 cm³. Its curved surface area is one-third of its total surface area. Its curved surface area (in cm²) is:
(Take $\pi=\frac{22}{7}$ )

Option 1: 572 cm²

Option 2: 528 cm²

Option 3: 660 cm²

Option 4: 616 cm²

Question : The volume of a solid hemisphere is 19,404 cm³. Its total surface area (in cm²) is:
(Take $\pi=\frac{22}{7}$)

Option 1: 2772

Option 2: 3465

Option 3: 2079

Option 4: 4158

Question : The slant height of a cone is 20 cm. If the area of its base is 616 cm², then what is the curved surface area of this cone? (use $\pi=\frac{22}{7}$)

Option 1: 960 cm²

Option 2: 400 cm²

Option 3: 1760 cm²

Option 4: 880 cm²

Question : The curved surface area of a solid circular cylinder of height 12 cm is 2640 cm². What is the volume (in cm³) of the cylinder? (Take $\pi =\frac{22}{7}$)

Option 1: 46200

Option 2: 37900

Option 3: 42000

Option 4: 55200