Mathematics
Medium
Question
A sum of money placed at compound interest doubles itself in 5 years in how many years it would to 8 times of itself at the same rate of interest?
A
7 years
B
10 years
C
15 years
✓ Official correct answer
D
20 years
Community credibility
Registered members can vote for the answer they believe is correct today and explain why. If the facts change after an election or news event, suggest a new option so others can vote it up.
A
7 years
No member explanations yet for this option.
B
10 years
No member explanations yet for this option.
C
15 years
No member explanations yet for this option.
D
20 years
No member explanations yet for this option.