Question

A man is thrice as old as his son five years ago the man was 4times as old as his son. Find their present age

Answer 1

Answer:

a man age be 45 yrs and his son age be 15 yrs.

Step-by-step explanation:

Let the age of a man and his son be x and y respectively. Then,

By condition, x = 3y______1

Five years ago,

a man's age = x - 5

his son's age = y - 5

so, x - 5 = 4(y - 5)

or, x - 5 = 4y - 20

or, x - 4y = -20+5

or, 3y - 4y = -15 ( from 1 )

or, - y = - 15

or, y = 15

Put the value of y in 1, we get:

x = 3 × 15

or, x = 45