Question

Average age of man and his son is 24 years. the ratio of their ages is 11:5 respectively .what is the ratio between their ages after 3 years

Answer 1

Hi there,

Let the man's present age be f
His son's present age be s

Average
(f+s)/2 = 24 yrs
so sum of their ages = 24*2 = 48
f+s = 48

now given that f:s = 11:5
f/s=11/5
f=(11/5)s

(11/5)s+s=48
s(16/5) = 48
s= 15
f= 48-s = 33

so ratio of their ages after 3 years is
(f+3) / (s+3)
36/18 = 2/1

so answer is 2:1


Hope it helped you.
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Cheers !!!
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