RS Aggarwal Solutions Class 7 Maths Chapter 9 Ex 9.2 2021-22

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RS Aggarwal Solutions Class 7 Maths Chapter 9 Ex 9.2

RS Aggarwal Solutions Class 7 Maths Chapter 9 Ex 9.2 – Overview

Introduction

In Inverse variation the value of the first quantity changes inversely according to the value of another quantity. Therefore, it is also said to be the inverse proportion.

Inverse variation implies that a variable is contrarily differing concerning another variable. Consequently, a variable is contrarily relative to another variable. For instance: if the distance covered by the train at consistent speed expands, at that point the time taken by it builds as well and the other way around.

Inverse Variation Equation

The increase in the value of one quantity leads to the same proportion of decrease in the value of another quantity and vice versa. It is called “Inverse Variation”, and if such a situation happens then, we can say that the two quantities are inversely proportional to each other.

The quantities happening in the inverse variation state can be denoted as –

Q ∝ 1R

and, QR = k

In the above equation, we can say that Q and R can be the two different values of two quantities.

The symbol ‘k’ can be known as the ‘constant of proportionality. Here, k is the constant term that does not change with time.

Also, if the Q1 and R1 are symbolized as the initial values and let us say Q2 and R2 are symbolized as the final values having their existence in the inverse variation form, then, in this case, they can be expressed as – Q1Q2 = R2R1

Inverse Variation Formula

According to the “Inverse Variation Formula”, if any of the variables, let us say, Q is inverse proportional to another variable, let us say, R, then we can represent the variables named as Q and R in the following form

QR = k, Or

R = ( k / Q )

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RS Aggarwal Solutions Class 7 Maths Chapter 9 Ex 9.2 (Updated For 2021-22)