(Question: 21)
21. At present a boy's father is 6 times
older and his grandfather 13 times
older than the boy. If six years later,
the grandfather will be seven times
older than the boy, what is the present
age of the boy's father?
1) 36 years 2) 42 years
3) 30 years 4) 48 years
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Answers
Answered by
7
let present age of boy be x
ATQ,
father's age = 6x
grand father's age= 13x
also,
13x + 6= 7(x+6)
13x + 6= 7x + 42
6x = 36
x = 6.
Thus,
present age of father is (1)36 years
thanya50:
thank you for your ans
Answered by
4
option (1)= 36 years is ryt
let at present boy's age is = x years
father's age. = 6x
grandfather's age is = 13x
after 6 years
boy 's age will be= x + 6
grandfather's age will be = 13x + 6
and
grandfather will be 7 times older than boy
so, 13x+ 6= 7(x+6)
13x+6= 7x+ 42
13x-7x = 42-6
6x = 36
x= 6
hence boy's age at present = 6years
father's age at present= 6x = 6×6
= 36 years
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