Question

grandfather is 10times older than her granddaughter. if grandfather is 56year old .find their present age
​

Answer 1

Answer:

LIDO Learning Logo

Book a free class

Ncert solutions

Our top 5% students will be awarded a special scholarship to Lido.

Book a free class now

Set your child up for success with Lido, book a class today!

Book a free class now

Mathematics

Science

chapter-logo

Chapters in NCERT Solutions - Mathematics , Class 8

exercise-logo

Exercises in Linear Equations in One Variable

Question 17

Q9) A grandfather is ten times older than his granddaughter. He is also 54 years older than her. Find their present ages.

Solution

Transcript

Solution:

Let the present age of granddaughter be x years.

Therefore, Grandfather’s age = 10x years.

According to question, 10x=x+5410x=x+54

\Rightarrow10x-x=54⇒10x−x=54

\Rightarrow9x=54⇒9x=54

\Rightarrow x=\frac{54}{9}=6⇒x=

9

54

=6 years.

Hence, granddaughter’s age = 6 years and grandfather’s age = 10 x 6 =60

Answer 2

Step-by-step explanation:

Let grand daughter's age: x

∴ Grandfather's age: 10x

As per the questions

Grandfather's age = Grand daughter's age +56

10x=x+56

9x=56

x=56÷9

x=6.22(6years 2 months)