The average age of husband, wife and their child 3 years ago was 27 years and that of wife and the child 5 years ago was 20 years. The present age of the husband is
Sum of the present ages of husband, wife and child = (27 $\times$ 3 + 3 $\times$ 3) years = 90 years.
Sum of the present ages of wife and child = (20 $\times$ 2 + 5 $\times$ 2) years = 50 years.
Therefore, Husband`s present age = (90 - 50) years = 40 years.
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