Question : The curved surface area is thrice as big as the base area of a cone. If the diameter of the cone is 1 cm. Then what is the total surface area (in cm²) of the cone?

Option 1: $\pi$

Option 2: $3\pi $

Option 3: $2\pi$

Option 4: $4\pi $

Question : Find the surface area of a spherical ball that has a radius of 1.1 cm.

Option 1: 16 cm²

Option 2: 12.1 cm²

Option 3: 11.2 cm²

Option 4: 15.2 cm²

Question : The side of a square is equal to 40% of the radius of a sphere. If the volume of the sphere is $\frac{500 \pi}{3} \mathrm{~m}^3$, then what is the area of the square?

Option 1: 2 m²

Option 2: 1 m²

Option 3: 9 m²

Option 4: 4 m²

Question : Find $\frac{1}{21}$th of the volume of a hemisphere whose radius is 4.2 m.

Option 1: 6.6 m³

Option 2: 7.3 m³

Option 3: 8.2 m³

Option 4: 7.1 m³

Question : The curved surface area of a cylinder, whose height is 10 cm, is 1320 cm². What is the volume of this cylinder? [Use $\pi$ $\left.=\frac{22}{7}\right]$

Option 1: 1388 m³

Option 2: 0.001368 m³

Option 3: 0.1386 m³

Option 4: 0.01386 m³