A sum of money place at compound interest doubles itself in 7 years.
A sum of money place at compound interest doubles itself in 7 years. In how many years will it amount to eight times itself?
Answer/Solution
21
Steps/Work
100 ---- 200 ---- 7
400 ---- 7
800 ---- 7
------
21 years
Answer: A
400 ---- 7
800 ---- 7
------
21 years
Answer: A