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Age Problem
The sum of the present ages of a father and son is 60 years. Six years ago,fathers age was five times the age of the son. After six years,sons age will be ?
Read Solution (Total 12)
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- 20 years
If present age of father=x and son=y, then x+y=60 ---(i) and (x-6)=5(y-6) or x-5y=-24 ---(ii)
On solving (i) & (ii), x=46, y=14, So son's age after 6 years will be 14+6=20 years - 9 years agoHelpfull: Yes(12) No(0)
- let the sons age six years ago be x then fathers age will be 5x
now given the sum of present ages of son and father is 60 i.e x+6+5x+6=60
6x+12=60
6x=48 i.e x=8 then the present ages of son and father becomes as son=8+6 =14 and father=5*8+6=46
But in question we have to find that sons age after 6 years i.e 14+6=20 - 7 years agoHelpfull: Yes(2) No(0)
- The age of son after 6 years is 20.
The present age of son is calculated using F + S = 60. Before 6 years it is calculated as (F - 6) = 5(S - 6) and the age of son is calculated - 9 years agoHelpfull: Yes(1) No(0)
- father's present age=x
son's present age=y
sum of their present ages=60 ==> x+y=60 -----eq(1)
6 years ago, father's age=x-6
son's age=y-6
given that, 6 years ago father's age=5 times of son's age ==> x-6=5(y-6) -----eq(2)
on solving eq(1) & (2), we get y=14 ==>son's present age=14
after 6 years son's age=14+6=20 - 8 years agoHelpfull: Yes(1) No(0)
- f+s=60 ------------(i)
f-6=5(s-6) -----------(ii)
After solving equation (i) & (ii)
s=14+6=20. - 8 years agoHelpfull: Yes(1) No(0)
- father age+son age=60. before 6years father age 5times of son age=5:1=48(6years back son age decrease 6years&father age decrease 6yeas total decrease 12 years) now f+s=60 and after 6years son age 20
- 9 years agoHelpfull: Yes(0) No(0)
- s+f=60 (present age);
s+(5*s)=60-6; (6yr ago father was 5*son);
6*s=54;
s=14 yr; (age of son before 6 yr);
so
s=20 yr; (son age after 6 yr).
- 9 years agoHelpfull: Yes(0) No(0)
- by given data,
(7 people+new)/8=(7 people+65)/8+2.5
solving, new=85 - 8 years agoHelpfull: Yes(0) No(0)
- F+S=60=> F=S-60
F-6=5(S-6)
S-60-6=5S-30
S=14
after 6 years=S+6
=14+6=20years(sons age after 6 years) - 8 years agoHelpfull: Yes(0) No(0)
- 20
16+4 =20 - 7 years agoHelpfull: Yes(0) No(0)
- x+y=60
(x-6)=5(y-6)
by solving y=14
after six year son age will be 20 - 7 years agoHelpfull: Yes(0) No(0)
- let son age is x then father age will be (60-x)
after six yr (60-x)-6=5(x-6)
x=14
so after six yr son age=14+6=20 yr ans - 6 years agoHelpfull: Yes(0) No(0)
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