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Examples: Surface Area of Cube and Cuboid Video Lecture - Class 9

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FAQs on Examples: Surface Area of Cube and Cuboid Video Lecture - Class 9

1. What is the formula to find the surface area of a cube?
Ans. The formula to find the surface area of a cube is 6a², where "a" represents the length of one side of the cube.
2. How to calculate the surface area of a cuboid?
Ans. To calculate the surface area of a cuboid, you need to find the sum of the areas of all its faces. The formula is 2(lw + lh + wh), where "l" represents the length, "w" represents the width, and "h" represents the height of the cuboid.
3. What is the difference between a cube and a cuboid?
Ans. A cube is a three-dimensional figure with all sides equal in length, while a cuboid is a three-dimensional figure with all sides of different lengths. In a cube, all angles are right angles, whereas in a cuboid, only the opposite faces are parallel and equal.
4. Can a cube and a cuboid have the same surface area?
Ans. No, a cube and a cuboid cannot have the same surface area unless their dimensions are the same. The surface area of a cube is given by 6a², while the surface area of a cuboid is given by 2(lw + lh + wh). As the formulas differ, the surface areas will be different unless the dimensions match.
5. What are some real-life examples of cubes and cuboids?
Ans. Some real-life examples of cubes include dice, sugar cubes, and Rubik's cubes. Examples of cuboids include books, bricks, and cereal boxes. These shapes can be found in various objects we encounter in our daily lives.
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