An amount becomes its two times in 7 years at a fixed rate of compound interest then in how many years it will become eight times rate of interest?
A. 21 years
B. 28 years
C. 14 years
D. 49 years
Answer:A
An amount becomes its two times in 7 years at a fixed rate of compound interest then in how many years it will become eight times rate of interest?
A. 21 years B. 28 years C. 14 years D. 49 years