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The number of years required for a sum of money to get tripple at the effective rate of 4% is : (Given (1.04)28=3)(1.04)^{28} = 3)

Solution

✅ Correct Option: 3

For money to triple, the final amount must be 3 times the initial amount.

Using the compound interest formula where the final amount equals the initial amount multiplied by (1+rate)time(1 + \text{rate})^{\text{time}}:

Let the initial amount be PP and time be tt years.

Final amount =3P= 3P

Rate =4%=0.04= 4\% = 0.04


Setting up the equation:

3P=P×(1.04)t3P = P \times (1.04)^t

Dividing both sides by PP:

3=(1.04)t3 = (1.04)^t


Given that (1.04)28=3(1.04)^{28} = 3

Comparing with the equation 3=(1.04)t3 = (1.04)^t:

t=28t = 28


Therefore, the number of years required for the sum to triple is 28 years.

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