If a certain sum of money invested at a certain rate of compound interest doubles in 5 years. In how many years will it become 4 times?
20 years.
10 years.
15 years.
5 years.
Explanation:
Since, 22=4.22=4.
Therefore, The amount will become 4 times in 2 x 5 = 10 years.
Since, 22=4.22=4.
Therefore, The amount will become 4 times in 2 x 5 = 10 years.