John is now 1 4th times as old as his mother Ketty Four years hence his mother will be three times a...........

Logical Reasoning(Master ) Arithmetical Reasoning

John is now 1/4th times as old as his mother Ketty. Four years hence, his mother will be three times as old as her son. The age of his mother Ketty (in years) is

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Explanation:

Let John’s mother Ketty age be 4x years. Then, John’s age = x years.
Four years hence, John's age = (x + 4) years and John’s mother Ketty age = (4x + 4) years.
So, 4x+4= 3 (x+4)
4x-3x= 12-4;
x = 8.
John's mother Ketty age = 4x= 4 x 8=32 years