A. 1:4
B. 1:16
C. 1:8
D. 1:64
4πr12 : 4πr22 = 1 : 4
r1 : r2 = 1 : 2
4/3 πr13 : 4/3 πr23
r13 : r23 = 1 : 8
Correct Answer: 1:8 ✔
Last Updated: February 07, 2020
Related MCQs
- If the volume and surface area of a sphere is numerically the same then it’s radius is_________?
- A right cylinder and a right circular cone have the same radius and the same volume. The ratio of the height of the cylinder to that of the cone is_________?
- The radius of a circular cylinder is the same as that of a sphere. Their volumes are equal. The height of the cylinder is________?
- The number of solid spheres each of diameter 6 cm, that could be moulded to form a solid metal cylinder of height 45 cm and diameter 4 cm is?
- The length of the wire of 0.2mm radius that can be drawn after melting a solid copper sphere of diameter 18cm?
- The radius of a wire is decreased to one –third if volume remains the same length will increase
- If the volumes of two cubes are in the ratio 8: 1, the ratio of their edges is_________?
- A metal sheet 27 cm long 8cm broad and 1 cm thick is melted into a cube. The difference between the surface areas of two solids is__________?
- A wooden box of dimensions 8m x 7m x 6m is to carry rectangular boxes of dimensions 8cm x 7cm x 6cm. The maximum number of boxes that can be carried in 1 wooden box is?
- If the length, breadth and the height of a cuboid are in the ratio 6: 5: 4 and if the total surface area is 33300 cm2, then length breadth and height in cms, are respectively?
- The surface area of a cube is 726m2, its volume is?
- The height of two right circular cones are in the ratio 1:2 and their perimeters of their bases are in the ratio 3:4, the ratio of their volume is_________?
- Surface area of two spheres are in the ratio 1:4 what is the ratio of their volumes?
- The diameters of two spheres are in the ratio 1:2 what is the ratio of their volumes?
- The diameters of two spheres are in the ratio 1:2 what is the ratio of their surface area?
- The sides of a cube are in the ratio 1:2 the ratio of their volume is__________?
- A rectangular field 30 m long and 20 m broad. How much deep it should be dug so that from the earth taken out, a platform can be formed which is 8 m long, 5.5 m broad and 1.5 m high where as the earth taken out is increase by 10/5?
- Calculate the number of bricks, each measuring 25 cm * 15 cm * 8 cm required to construct a wall of dimensions 10 m * 4 m * 5 m when 10% of its volume is occupied by mortar?
- If in a box of dimensions 6 m * 5 m * 4 m smaller boxes of dimensions 60 cm * 50 cm * 40 cm are kept in it, then what will be the maximum number of the small boxes that can be kept in it?
- A brick measures 20 cm * 10 cm * 7.5 cm how many bricks will be required for a wall 25 m * 2 m * 0.75 m?
- In digging a pond 20 m * 10 m * 5 m the volumes of the soil extracted will be_________?
- If the height of a cone is increased by 100% then its volume is increased by_________?
- A cylinder and a cone have a same height and same radius of the base. The ratio between the volumes of the cylinder and cone is__________?
- The length of the longest rod that can fit in a cubical room of 4 m side is?
- The area of the cardboard(in cm2) needed to make a box of size 25 cm * 15 cm * 8 cm will be__________?
- A tank 3 m long, 2 m wide and 1.5 m deep is dug in a field 20 m long and 14 m wide. If the earth dug out is evenly spread out over the field, the level of the field will raise by nearly?
- A river 2m deep and 45 m wide is flowing at the rate of 3 kmph the amount of water that runs into the sea per minute is?
- The dimensions of an open box are 52, 40 and 29 cms. Its thickness is 2 cms. If 1 cm3 of metal used in the box weighs 0.5 gms, the weight of the box is________?
- The ratio of the volumes of a cube to that of the sphere which will fit inside the cube is________?
- A room is 15m long, 4m broad and 3m height. Find the cost of white washing its four walls at 50p per m2 ?
- How many meters of carpet 50cm, wide will be required to cover the floor of a room 30m * 20m?
- A rectangular courtyard, the sides of which are in the ratio of 4:3, cost Rs.600 for paving at 50 p per m2; find the length of the diagonal of the courtyard?
- If the sides of a cube are in the ratio 4:3. What is the ratio of their diagonals?
- Three cubes of metal whose edges are 9, 12 and 15 cm respectively, are melted and one new cube is made. Find the edge of the new cube?
- The ratio between the radii of two spheres is 1:3. Find the ratio between their volumes?
- How many shots of 1cm radius can be prepared from a sphere of 3cm radius?
- Find the ratio between whole surfaces of a sphere and a hemisphere?
- The curved surface of a sphere is 64 π cm2. Find its radius?
- The slant height of a cone is 12 cm and radius of the base is 4cm, find the curved surface of the cone.
- The area of a base of a cone is 30 cm2. If the height of the cone is 6cm, find its volume?
- The radius of the base of cone is 3 cm and height is 4 cm. Find the volume of the cone?
- Find the ratio of the curved surfaces of two cylinders of same heights if their radii are in the ratio 1:2.
- Two cylinders are of the same height. Their radii are in the ratio 1: 3. If the volume of the first cylinder is 40 cc. Find the volume of the second cylinder?
- Find the expenditure on digging a well 14m deep and of 3m diameter at Rs.15 per cubic meter?
- The radius of a cylindrical vessel is 7cm and height is 3cm. Find the whole surface of the cylinder?
- The diameter of a cylindrical tin is 6cm and height is 5 cm. Find the volume of the cylinder?
- The radius of a cylinder is 2 r units and height is 3 r units. Find the curved surface?
- The spherical ball of lead 3 cm in diameter is melted and recast into 3 spherical balls. The diameters of two of these are 1 ½ cm and 2 cm respectively. The diameter of third ball is?
- If a solid sphere of radius 10 cms is moulded into 8 spherical solid balls of equal radius, then surface area of each ball (in cm2) is________?
- The volumes of two cubes are in the ratio 27: 125, what shall be the ratio of their surface areas?
- What is the length of the longest pole which can be kept in a room 12 m long, 4 m broad and 3 m high?