How many cubes each of surface area 24sq. dm can be made from a metre ...
Find the area of 1 face of the small cube:
A cube has 6 faces
6 faces = 24 dm?
1 face = 24 ? 6 = 4 dm?
Find the length of the small cube:
Area = Length x Length
Length? = 4 dm?
Length = ?4
Length = 2 dm
Convert dm to m:
2 dm = 0.2 m
Find the number of cubes length-wise:
Number of cubes = 1 ? 0.2 = 5 cubes
Find the number of cubes breadth-wise:
Number of cubes = 1 ? 0.2 = 5 cubes
Find the number of cubes height-wise:
Number of cubes = 1 ? 0.2 = 5 cubes
Find the total number of cubes:
Total number of cubes = 5 x 5 x 5 = 125
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How many cubes each of surface area 24sq. dm can be made from a metre ...
Calculating the Number of Cubes
To determine the number of cubes that can be made from a meter cube with a surface area of 24 sq. dm, we need to follow a step-by-step process. Let's break it down:
Step 1: Determine the Volume of a Cube
- The surface area of a cube is given as 24 sq. dm.
- To calculate the volume of a cube, we need to find the side length (s) of the cube.
- The formula for the surface area of a cube is: SA = 6s^2, where SA is the surface area and s is the side length.
- Rearranging the formula, we have s^2 = SA/6.
- Substituting the surface area value of 24 sq. dm, we get s^2 = 24/6 = 4.
- Taking the square root of both sides, we find s = 2 dm.
Step 2: Determine the Volume of a Meter Cube
- A meter cube has a volume of 1 cubic meter (1 m^3).
- Since 1 meter is equal to 10 decimeters (1 m = 10 dm), the volume can also be expressed as 10 dm x 10 dm x 10 dm = 1000 cubic decimeters (1000 dm^3).
Step 3: Calculate the Number of Cubes
- Now that we know the side length of each cube (2 dm) and the volume of the meter cube (1000 dm^3), we can calculate the number of cubes.
- The volume of each cube is given by V = s^3, where V is the volume and s is the side length.
- Substituting the side length value of 2 dm, we have V = 2^3 = 8 cubic decimeters per cube.
- To find the number of cubes that can be made, we divide the total volume of the meter cube by the volume of each cube: 1000 dm^3 / 8 dm^3 = 125 cubes.
Conclusion
Therefore, from a meter cube with a surface area of 24 sq. dm, we can make 125 cubes, each with a surface area of 24 sq. dm.
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