Given, Sum = Rs. 10000 Amount = Rs. 14641 Rate = 20% per annum = 10% per 6 month Now, Amount = Principal{1 + (rate/100)}time ⇒ 14641 = 10000{1 + (10/100)}time ⇒ 14641/10000 = (11/10)time ⇒ (11/10)4 = (11/10)time ⇒ time = 4 AS, it was compounded half yearly ∴ Actual time of investment = 4/2 = 2 years |