The age of Mohan is four times that of his son Ajit. If the sum of their ages is 30 years, Ajit’s age is years.
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Sol:
Let Ajit’s present age be x.
Mohan’s present age is 4 times that of his son Ajit = 4x
Sum of their ages is 30 years.
⇒ x + 4x = 30
⇒ 5x = 30
=>x=30/5
=>x=6 years
