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Kamal was 4 times as old as his son 8 years ago. After 8 years, Kamal will be twice as old as his son. Find out the present age of Kamal.

40 years
38 years
42 years
36 years
Explanation:

Let the age of the son before 8 years = $x$

Then age of Kamal before 8 years ago = 4$x$

After 8 years, Kamal will be twice as old as his son

=> 4$x$ + 16 = 2$\left(x + 16\right)$

=> $x$ = 8

Present age of Kamal = 4$x$ + 8 = 4×8 + 8 = 40

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