NCERT Solutions for Class 8 Maths, Chapter 13 - Direct and Inverse Proportions

In this chapter, you’ll study about direct and inverse proportions. Two variables are said to be directly proportionate, if they both change in the same sense, i.e., if the amount of one variable increases, the amount of the other variable also increases or if the amount of one variable decreases, the other also decreases. For instance, the more money you deposit in the bank, the more interest you receive or the more number of hours you work, the more you are paid.

On the other hand, two variables are called inversely proportionate if one of the variables is directly proportionate to the reciprocal of the other (multiplicative inverse). If the amount of one variable increases, the amount of the other variable decreases and vice versa. For instance, as the speed of the car increases, the time taken to reach the destination decrease or the more the number of workers, the lesser time it takes to finish a job.

Let’s take a look at topics and sub-topics of Class 8 Maths Chapter 13, Direct and Inverse Proportions

13.1 Introduction

13.2 Direct Proportion

13.3 Inverse Proportion

In Class 8 Maths Chapter 13, you will learn –

Section 13.2 – In this section, you’ll learn what direct proportion is and solve problems like finding the length of the cloth, the height of the tree, finding the actual distance covered and more.

Section 13.3 – In this section, you’ll learn what inverse proportion is and solve problems related to finding the time taken to fill in the water tank, time taken to finish a job, area of land per person and more.

In this chapter, you are provided with several examples along with their solutions for a clear understanding of Direct and Inverse Proportions. To know more about Class 8 Maths Chapter 13 Direct and Inverse Proportions, you should explore the exercises below. You can also download the Direct and Inverse Proportions Class 8 NCERT Solutions PDF, solved by expert Maths trainers.