0 votes 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 asked Jul 21, 2022 • edited Aug 5, 2022 by Lakshman Bhaiya Lakshman Bhaiya 13.8k points 253 views answer comment Share See all 0 reply Please log in or register to add a comment.