## RS Aggarwal Solutions Class 8 Chapter-20 Volume and Surface Area of Solids (Ex 20C) Exercise 20.3 - Free PDF

## FAQs on RS Aggarwal Solutions Class 8 Chapter-20 Volume and Surface Area of Solids (Ex 20C) Exercise 20.3

**1. What is the Surface Area in Mathematics?**

The surface area is a fundamental concept in Mathematics. It's a way of measuring how much space an object takes up.

The surface area is usually calculated by adding up the areas of the faces of an object. For example, for a cube, you would calculate the area of the six faces and add them together, just as you would with a rectangle or circle.

**2. What is Volume in Math?**

Volume is the space taken up by an object. Volume is measured in cubic units, like cubic centimetres or cubic meters.

The thing to remember: Volume is only one of the ways to measure size. For example, if you are measuring the distance between two points, you can use the formula for length. If you're measuring how much paint you need to cover a wall, you can use the formula for the area instead.

And when you are figuring out the volume, remember that it doesn't take into account how much space an object will take up when it is filled with something else. A bucket of water has a certain volume but doesn't take up very much space on its own.

**3. What is the difference between Volume and Surface Area in Math?**

Volume and Surface Area are two ways of measuring the size of 3D objects. Volume is how much space an object takes up, while Surface Area is the amount of space the outside of the object takes up.

Volume is useful for many problems in physics and engineering. The Surface Area is useful for problems in Chemistry, where you are trying to figure out how much material you need to coat something or what shape you want to make a container that will hold something.

**4. What is the Surface Area of Solids?**

The Surface Area of a solid is the sum of the areas of its surfaces. For example, a cube has six square faces, each with an area of one side times one side. The surface area is therefore 6 square sides. The sphere has a single spherical face, the area of which is four times pi and radius-squared or 4 π r2. Likewise, a cylinder has three faces, a rectangular pyramid has 5 faces, etc.

**5. Why is RS Aggarwal's Math book essential for students in Class 8?**

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