Let the age of new comer be x
Avg age decrease by 1/12 year ?24 X 1/12 = 18 ?x
?x=16 years
The present age of Father (f) = 48 and present age of son (s) = 28.8
The age of father at his sons birth is 48 - 28.8 = 19.2
Therefore the age of father was 2/3rd of his son's age at the time of his sons birth
Let the present age of Ayush be x yr.
Present age of his son =
D =W-20 = H-24
S = H-28
H+H-4+H-24+H-28/4 = 23
H =37 D =13
H + D = 50
Let the present age of P be 8x and Q be 5x After 4 years, P's age = 8x + 4 and Q's age = 5x + 4 8x+4/5x+4 = 4/3 24x+12 = 20x+16 => 4x = 4=> x = 1 Present age of P = 8 years Present age of Q = 5 years Required ratio = 15 : 5 = 3 : 1
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