A man is four times as old as his son. In five years he will be only three times as old as his son. What is the man's present age?

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Answer 1 · 2018-05-07T05:44:11

Present age of man = 40 years

Let the present age of son be 'x' years.

Then, the present age of man is 4x years.

After 5 years,
Age of son = x+5
Age of man = 4x+5

Given,
age of man after 5 years = 3 times age of son after 5 years

That is,

#4x+5=3(x+5)#

#4x+5=3x+15#

#x=15-5#

#= 10#

Thus,

Present age of man #= 4xx10#

=40