Question

1. The age .of anu's sister is 6 times that of anu. After 4 years, it would be 2 times. What are ages of Anu and her sister ​

Answer 1

Answer:

Anu's age=1yr

Anu's sister's age=6yrs

Step-by-step explanation:

Let the age of Anu  be x yrs

So age of Anu's sister=6x yrs

Age of Anu after 4 yrs=(x+4)yrs

Age of Anu's sister after 4 yrs=(6x+4)yrs

Accordingly,

2(x+4)=(6x+4)

=>2x+8=6x+4

=>2x-6x=4-8

=>-4x=-4

=>4x=4                        [- cuts off]

=>x=4/4

=>x=1

So Age of Anu=x yrs=6 yrs

So Age of Anu's sister=6x yrs=6*1yrs=6yrs              [* means multiplication]

Ans:- Age of Anu is 1yr and age of Anu's sister is 6yrs

                                              Extra(No need to write):-

According to question after 4 yrs Anu's sister's age will be 2 times that of Anu's age.

so (x+4)yrs=(1+4)yrs=5yrs

    (6x+4)yrs=(6+4)yrs=10yrs

So the answer is right according to the question as 10=5*2

Answer 2

Answer:

Anu's age is 1 year and Anu's Sister's age is 6 years

Step-by-step explanation:

Let,

Anu's Sister's age be 'X'

Anu's age be 'Y'

According to the question,

Current age equation=>   X=6Y (i)

After 4 years,

X+4= 2(Y+4)

=> X+4=  2Y+8

=> X-2Y= 8-4

=> X-2Y= 4 (ii)

Substituting (i) in (ii),

=> 6Y-2Y= 4=>

4Y=4

=>

Y= 4/4 => 1 year (Anu's Age)

Now,

Anu's Sister's age is => 6*1 => 6 years

I hope it helped you buddy!!!!

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