engineering recuitment DRDO CEPTAM STA B Tier I (Sr. Technical Assistant) Mock Test 2022 Quantitative Aptitude Ratio and Proportion Age
Nine years ago, a father was five times as old as his son. Now at present, the father is only twice as old as his son. Then the sum of the present ages of the son and the father is:
1
36
2
54
3
72
4
108