Question : Four circles of equal radii are described around the four corners of a square so that each touches two of the other circles. If each side of the squares is 140 cm, then the area of the space enclosed between the circumference of the circle is: (Take $\pi=\frac{22}{7}$)

Option 1: 4200 cm²

Option 2: 2100 cm²

Option 3: 7000 cm²

Option 4: 2800 cm²

Question : The volume of a sphere of radius 4.2 cm is: (Use $\pi=\frac{22}{7}$)

Option 1: 278.234 cm³

Option 2: 312.725 cm³

Option 3: 297.824 cm³

Option 4: 310.464 cm³

Question : The radius of a large solid sphere is 14 cm. It is melted to form 8 equal small solid spheres. What is the sum of the total surface areas of all 8 small solid spheres? (use $\pi=\frac{22}{7}$)

Option 1: 3648 cm²

Option 2: 4928 cm²

Option 3: 4244 cm²

Option 4: 4158 cm²

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

Question : If the slant height of a cone is 60 cm and the radius of its base is 21 cm, then find its curved surface area is? (use $\pi=\frac{22}{7}$)

Option 1: 3880 cm²

Option 2: 3820 cm²

Option 3: 3960 cm²

Option 4: 4020 cm²