Question

arun's age is four years more then prashants age. 4 year ago, the ratio of their age was 5:4 . find their present ages.

Answer 1

Answer:

Let the age of Prashant be x. This implies Arun's age is x + 4.

Before 4 years their ages would have been:

Prashant = x - 4, Arun = x

That was in the ratio 4 : 5

=> x - 4 : x = 4 : 5

Product of Means = Product of Extremes

=> ( x - 5 ) ( 4 ) = ( 5 ) ( x )

=> 5x - 20 = 4x

=> 5x - 4x = 20

=> x = 20 years

Hence age of Prashant is 20 years. Age of Arun is 20 + 4 = 24 years.