Question : The volume of a solid right circular cylinder of height 8 cm is $392 \pi$ cm³. Its curved surface area (in cm²) is:

Option 1: $161 \pi$

Option 2: $96 \pi$

Option 3: $210 \pi$

Option 4: $112 \pi$

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 : If the curved surface area of a cylinder is $126\pi$ cm² and its height is 14 cm, what is the volume of the cylinder?

Option 1: $283 \frac{1}{2} \pi\ \mathrm{cm}^3$

Option 2: $137\frac{1}{2} \pi\ \mathrm{cm}^3$

Option 3: $128\frac{1}{2} \pi\ \mathrm{cm}^3$

Option 4: $125\frac{1}{2} \pi\ \mathrm{cm}^3$

Question : The curved surface area of a solid hemisphere is 22 cm². What is the total surface area of the hemisphere? (use $\pi=\frac{22}{7}$)

Option 1: 66 cm²

Option 2: 44 cm²

Option 3: 33 cm²

Option 4: 30 cm²