0 0 votes A sum of money doubles itself at compound interest in $9$ years. In how many years will it become eight times? $18$ years $27$ years $36$ years $72$ years Quantitative Aptitude nielit2022feb-scientistc + – Lakshman Bhaiya 12.2k points 1.1k views answer comment Share Follow Print 0 reply Please log in or register to add a comment.