| I am three times as old as my son. 15 yr hence, I will be twice as old as my son. The sum of our ages is |
A) 48 yr
B) 60 yr
C) 64 yr
D) 72 yr
Correct Answer: B
Solution :
| Let the son's present age be x yr. |
| \[\therefore \] Father's present age = 3x yr |
| According to the question, |
| \[3x+15=2\,(x+15)\] |
| \[\Rightarrow \] \[3x+15=2x+30\] |
| \[\therefore \] \[x=30-15=15\] |
| \[\therefore \] Sum of their present ages \[=x+3x=4x\] |
| \[=4\times 15=60\,yr\] |
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