the age of a man is 4 times that of his son.the age of the father at the time of birth of his son was 30
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A man is 4 times as old as his son. In 3 years, the father will be 3 times as old as his son. How old is each of them now?
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POHNPEI397 eNotes educator
| CERTIFIED EDUCATOR
Right now, the man is 24 and his son is 6. Here is how you figure this out:
Let the man's age by M and the son's age be S.
Right now M = 4S
In three years
M + 3 = 3(S + 3)
So you put the 4S in to substitute for the M.
4S + 3 = 3(S + 3)
4S + 3 = 3S + 9
S = 6
If the son is 6, the father must be 24.
We can check this by adding three to both ages. Then, the son will be 9 and the father will be 27, which is three times 9.
Step-by-step explanation:
【At the of his son birth age of father age is 30.
i.e Age difference between son and father is 30】
let
current age of son is x
age of father is 4x
according to the Question
4x- x=30
3x=30
x=10
therefore age of son is 10
age of father is 40