This chapter is just an extended version of the chapter mensuration, in which the students learnt about the surface areas and volumes in earlier classes. In this chapter, students will learn to find the surface areas and volumes of cuboids and cylinders in detail and broaden the study to some other solids, such as cones and spheres. There are 8 exercises in this chapter, and these exercises contain problems that are based on surface areas and volumes of different solids such as cubes, cuboids, Spheres, cylinders, cones, and hemispheres.