Question : A hemisphere has a 42 cm diameter. Find its curved surface area and the total surface area.

Option 1: 2772 cm² and 4158 cm²

Option 2: 3772 cm² and 5158 cm²

Option 3: 4770 cm² and 4238 cm²

Option 4: 3072 cm² and 4058 cm²

Question : What is the difference between the total surface area and the curved surface area of a cone whose radius is 35 cm? (Take $\pi=\frac{22}{7}$)

Option 1: 3850 cm²

Option 2: 3704 cm²

Option 3: 3750 cm²

Option 4: 3675 cm²

Question : The total surface area of a right circular cylinder is 1848 cm². The ratio of its total surface area to the curved surface area is 3 : 1. The volume of the cylinder is: (Take $\pi=\frac{22}{7}$)

Option 1: 4312 cm³ 

Option 2: 3696 cm³ 

Option 3: 4002 cm³ 

Option 4: 4851 cm³ 

Question : The total surface area of a hemisphere is 462 cm². The diameter of this hemisphere is:

Option 1: 28 cm

Option 2: 21 cm

Option 3: 7 cm

Option 4: 14 cm

Question : The diameter of a hemisphere is equal to the diagonal of a rectangle of length 4 cm and breadth 3 cm. Find the total surface area (in cm²) of the hemisphere.

Option 1: $25 \pi$

Option 2: $\frac{75 \pi}{4}$

Option 3: $\frac{50 \pi}{4}$

Option 4: $\frac{25 \pi}{4}$