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Five years hence, father's age will be three times the age of his son. Five years ago, father was seven times as old as his son. Find their present ages.
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Answer:
answer in the attachment hope it helps you
Step-by-step explanation:
Given :
Five years hence, father's age will be three times the age of his son.
Five years ago, father was seven times as old as his son.
To find :
Their present ages.
Solution :
Let the present ages of the Father and the Son be x and y years.
1st condition : [Hence/Future]
=> After 5 years man’s age = x + 5
=> After 5 years ago son’s age = y + 5
According to the question :
=> x + 5 = 3(y + 5)
=> x + 5 = 3y + 15
=> x - 3y = 10 -- (1)
2nd condition : [Ago/Past]
=> 5 years ago man’s age = x - 5
=> 5 years ago son’s age = y - 5
According to the question :
=> x - 5 = 7(y - 5)
=> x - 7y = -30 -- (2)
Subtracting (2) from (1) :
=> x - 7y = -30
=> x - 3y = 10
=> 4y = 40
=> y = 10
Substitute the value of y in (1) :
=> x - 3y = 10
=> x - 3(10) = 10
=> x - 30 = 10
=> x = 40
Therefore :
Father's present age = 40 years.
Son’s present age = 10 years.
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