Question

He average age of a father and his only son is 25% more than the average age of that boy and his mother. When that boy was born, his mother was 30 years old and his father was 40 years old. Find the present age of father

Answer 1

Answer:

Step-by-step explanation:

Answer 2

let say current age of boy = 2B years

average age of father and boy = (40 +2B)/2 = 20+ B years

average age of mother and boy = (30+2B)/2 = 15 + B years

20+ B = (15+B) ( 1 + 25/100)

=> 20 + B = (15 + B) (5/4)

=> 80 + 4B = 75 + 5B

=> B = 5

Age of Boy = 2B = 10 years