Question

The age of a man is thrice his son. 15 yrs

ago, he was 9 times as old as his son. Find

the age of the man after 15 years.​

Answer 1

Answer:

75

Explanation:

Let the age of the son be x years.

Then, age of man =3x years.

15 years ago, son's age was (x−15) years,

and man's age was (3x−15) years.

Given, (3x−15)=9(x−15)

⇒3x−15=9x−135⇒9x−3x=135−15

⇒6x=120⇒x=

6

120

=20

∴ son's present age =20 years

and man's present age =60 years

Hence, the man's age after 15 years =(60+15) years =75 years