chapter-header

NCERT Exemplar Solutions Class 8 Mathematics Solutions for Squares and Square Roots & Cubes and Cube Roots - Exercise in Chapter 3 - Squares and Square Roots & Cubes and Cube Roots

Question 111 Squares and Square Roots & Cubes and Cube Roots - Exercise

A decimal number is multiplied by itself. If the product is 51.84, find the number.

Answer:

Let us assume decimal number be ‘a’.

We know that a × a = a^2

So,

a × a = 51.84

a^2 = 51.84

a = √51.84

The required number is found out by using long division method.

NCERT Exemplar Solutions - Mathematics - class 8 chapter Squares and Square Roots & Cubes and Cube Roots Question 111 Solution image

Then,

a = √51.84

a = 7.2

∴ 7.2 is the decimal number is multiplied by itself and its product is 51.84.

Connect with us on social media!
2022 © Quality Tutorials Pvt Ltd All rights reserved