The edge of a cube is 2a cm. Find its surface?

Related Mcqs:

1. The edge of three cubes of metal is 3 dm, 4 dm and 5 dm. They are melted and formed into a single cube. Find the edge of the new cube?

   A. 3 dm
   B. 4 dm
   C. 5 dm
   D. 6 dm

2. The edges of three iron cubes are 6cm; 8cm; 10cm respectively. A new cube was made by melting them. Find the edge of the new cube?

   A. 8 cm
   B. 12 cm
   C. 14 cm
   D. 10 cm

3. 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?

   A. 21 cm
   B. 19 cm
   C. 32 cm
   D. 18 cm

4. A large cube is formed from the material obtained by melting three smaller cubes of 3, 4 and 5 cm side. What is the ratio of the total surface areas of the smaller cubes and the large cube?

   A. 2 : 1
   B. 3 : 2
   C. 25 : 18
   D. 27 : 20

5. The ratio of the volumes of a cube to that of the sphere which will fit inside the cube is________?

   A. 4:3
   B. 4:2
   C. 4:4
   D. 6: π

6. How many cubes of edge 2 dm can be cut out of a meter cube?

   A. 50
   B. 64
   C. 216
   D. 125

7. The area of the floor of a room is 20 m² that of a longer wall 15 m² and of the shorter wall 12 m², find the edge of the new cube?

   A. 450 m³
   B. 100 m²
   C. 60 m³
   D. 400 m³

8. The surface of a cube is 24sq cm. Find its volume?

   A. 8 cc
   B. 16 cc
   C. 32 cc
   D. 64 cc

9. The volume of a cube is 1728 cc. Find its surface.

   A. 864 cm²
   B. 648 cm²
   C. 486 cm²
   D. 468 cm²

10. The surface area of a cube is 726m², its volume is?

    A. 1300 m³
    B. 1331 m³
    C. 1452 m³
    D. 1542 m³