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Maths Puzzle
Logical Reasoning
Seating Arrangement
A sum of money placed at compound interest doubles itself in 5 years. It will amount to eight times itself at the same rate of interest in?
Read Solution (Total 1)
-
- p(1+r/100)^5 = 2p
(1+r/100)=2^(1/5) ....(i)
p(1+r/100)^n= 8p
using (i) we get
2^(n/5)=2^3
n=15
so the answer is 15 years
- 11 years agoHelpfull: Yes(2) No(0)
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