Question

Prakruti age is 6 times sahils age. After 15 years Prakruti will be 3 times as old as sahil.Find their age.

Answer 1

let,
 sahil's present age be 'x'
prakruti's age is six times sahils age 
so, prakruti's age is 6x
after 15 years sahils age is x+15
 Prakruti will be 3 times as old as sahil
so  prakruti's age is 3(x+15)
but,
 according to previous given clue prakruti's age will be 6x+15
so,
6x+15=3(x+15)
6x+15=3x+45
6x-3x=45-15
3x=30
x=10
there fore
present age of sahil is 10 years and
 prakruti present age is 60 years

Answer 2

Answer:

let us consider sahil's present age  will be 6x

 sahil's present age be 'x'

prakruti's age is six times sahils age 

so, prakruti's age is 6x

after 15 years sahils age is x+15

 Prakruti will be 3 times as old as sahil

so  prakruti's age is 3(x+15)

but,

 according to previous given clue prakruti's age will be 6x+15

so,

6x+15=3(x+15)

6x+15=3x+45

6x-3x=45-15

3x=30

x=10

there fore

present age of sahil is 10 years and

 prakruti present age is 60 years