Question : The base of a pyramid is an equilateral triangle of side 10 m. If the height of the pyramid is $40 \sqrt{3}$ m, then the volume of the pyramid is:

Option 1: 1,000 m³

Option 2: 1,200 m³

Option 3: 9,00 m³

Option 4: 8,00 m³

Question : The radius of a right circular cylinder is four times its height. If the height of the cylinder is 14 cm, then what is the volume of the cylinder?

Option 1: 15468 cm³

Option 2: 14262 cm³

Option 3: 137984 cm³

Option 4: 11296 cm³

Question : If the volume of a sphere is $179 \frac{2}{3}$ m³, what is its surface area?

Option 1: 221 m²

Option 2: 154 m²

Option 3: 144 m²

Option 4: 151 m²

Question : The volume of a cone whose radius of a base and height are $r$ cm and $h$ cm respectively, is 400 cm³. What will be the volume of a cone whose radius of base and height are $2r$ cm and $h$ cm respectively?

Option 1: 100 cm³

Option 2: 1600 cm³

Option 3: 1200 cm³

Option 4: 800 cm³

Question : The length, breadth, and height of a room are 10 m, 8 m, and 6 m, respectively. Find the cost of whitewashing the walls of the room and the ceiling at the rate of 7.50 per m².

Option 1: Rs. 2220

Option 2: Rs. 1850

Option 3: Rs. 2150

Option 4: Rs. 2000