Father’s age is seven times his son’s age. After five years, the father’s age becomes four times his son’s age. What is the present age of the father?
A
30 yrs.
B
40 yrs.
C
45 yrs.
D
None of these
Correct Option:
D
Explanation
Let the son’s present age be x. The father is 7x. After five years, 7x+5=4(x+5). Solving gives 7x+5=4x+20, so 3x=15, x=5, and the father is 35 years old. Since 35 is not listed, “none of these” is correct.
