# RD Sharma Solutions for Class 8 Maths Chapter 21 Mensuration II (Volumes and Surface Areas of a Cuboid and a cube)

RD Sharma Solutions for Class 8 Chapter 21 Mensuration II- In this chapter, we will learn about the volumes and surface area of a cuboid and a cube. The formulae for the same will also be derived. The volume of the cuboid is equal to the product of the area of one surface and height. Volume of the cuboid = (length × breadth × height) cubic units. Volume of the cuboid = (l × b × h) cubic units. Example: If the length, breadth and height of a cuboid are 5 cm, 3 cm and 4 cm, then find its lateral surface area. This chapter mainly deals with volumes and surface areas of a cuboid and a cube. Some applications of these formulae to solve simple problems from everyday life situations will also be discussed. Topics discussed in this chapter are the volume of the space region formed by a body, a standard unit of volume, formula for finding the volume of a cuboid, the volume of a cube, other standard units of volume, surface areas of a cuboid and a cube, surface area of the walls of a room.