In this chapter, students will learn to find the surface area and volume of objects formed by combining basic solids such as cuboids, cones, cylinders, spheres, and hemispheres. The chapter explains how real-life objects can be broken into simple solids and how their total surface area and volume can be calculated using standard formulae.

Students will also define the frustum of a right circular cone and learn to calculate its volume, curved surface area, and total surface area. Through numerical problems and real-life applications, this chapter enhances spatial understanding and problem-solving skills, making it highly important for CBSE Board examinations and practical geometry-based questions.