Question

Five years ago, the average of
Rimi's age that time and Ruhi's age that time was 12 years.
Three years from now, if the
respective ratio between Rimi's
age and Ruhi's age that time
will be 5 : 3, what is Rimi's
present age?​

Answer 1

Answer:

5 yrs

Step-by-step explanation:

Let the age of Ruhi be x

Rimi be y

5 yrs ago

their ages x-5&y-5

x-5+y-5/2=12

x+y=14

y=14-x

After 3 yrs

x+3

y+3

y+3/x+3=5/3

17-x/x+3=5/3

51-x=5x+15

4x=36

x=9

y=5

Answer 2

The present age of Rimi is 22 years.

Step-by-step explanation:

Consider the provided information.

Five years ago, the average age of Rimi’s age that time and Ruhi’s age that time = 12 years

That means their total age is:  

$12=\frac{\text{Sum of Rimi and Ruhi's age}}{2}$

$\text{Sum of Rimi and Ruhi's age}=24$

Three years from now, that means after 5+3=8 years the  respective ratio between Rimi's  age and Ruhi's age that time  will be 5 : 3.

Sum of their age after 8 years = 24 + 16 = 40

Rimi’s age after 8 years = $40\times\frac{5}{8}= 25$

Rimi’s present age = 25 – 3 = 22.

Hence, the present age of Rimi is 22 years.

#Learn more

Age of a is one third of age of b. after 15year, the age of a will be half of the age of b. find their present age.

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