At the end of two years what will be the compound interest at the rate of 10% p.a. on an amount of Rs.2000?
Question
At the end of two years what will be the compound interest at the rate of 10% p.a. on an amount of Rs.2000?
Solution 1
Sure, here's how you can calculate the compound interest:
Step 1: Identify the principal amount, the interest rate, and the time period. In this case, the principal (P) is Rs. 2000, the interest rate (r) is 10% per annum, and the time (t) is 2 years.
Step 2: Convert the interest rate from a percentage to a decimal by dividing it by 100. So, r = 10/100 = 0.1.
Step 3: Use the formula for compound interest, which is A = P (1 + r/n)^(nt), where A is the amount of money accumulated after n years, including interest. n is the number of times that interest is compounded per unit t, for example if interest is compounded yearly then n = 1, if semi-annually then n = 2, quarterly then n = 4, etc. In this case, as it is not mentioned, we assume that interest is compounded yearly, so n = 1.
Step 4: Substitute the values into the formula: A = 2000 (1 + 0.1/1)^(1*2) = 2000 (1.1)^2.
Step 5: Calculate the amount: A = 2000 * 1.21 = Rs. 2420.
Step 6: Subtract the initial principal from the calculated amount to get the compound interest. So, the compound interest is Rs. 2420 - Rs. 2000 = Rs. 420.
So, the compound interest on an amount of Rs. 2000 at the rate of 10% per annum for 2 years is Rs. 420.
Solution 2
To calculate the compound interest, we use the formula:
A = P (1 + r/n) ^ nt
Where: A = the amount of money accumulated after n years, including interest. P = principal amount (the initial amount of money) r = annual interest rate (in decimal) n = number of times that interest is compounded per year t = time the money is invested for in years
Given in the problem: P = Rs. 2000 r = 10% per annum = 0.10 (in decimal) n = 1 (interest is compounded annually) t = 2 years
Substituting these values into the formula:
A = 2000 (1 + 0.10/1) ^ (1*2) A = 2000 (1 + 0.10) ^ 2 A = 2000 (1.10) ^ 2 A = 2000 * 1.21 A = Rs. 2420
The compound interest is then calculated by subtracting the initial principal from the compounded amount:
Compound Interest = A - P Compound Interest = Rs. 2420 - Rs. 2000 Compound Interest = Rs. 420
So, the compound interest on an amount of Rs. 2000 at the rate of 10% per annum at the end of two years will be Rs. 420.
Solution 3
To calculate the compound interest, we use the formula:
A = P (1 + r/n) ^ nt
Where: A = the amount of money accumulated after n years, including interest. P = principal amount (the initial amount of money) r = annual interest rate (in decimal) n = number of times that interest is compounded per year t = time the money is invested for in years
Given in the problem: P = Rs. 2000 r = 10% per annum = 0.10 (in decimal) n = 1 (interest is compounded annually) t = 2 years
Substituting these values into the formula:
A = 2000 (1 + 0.10/1) ^ (1*2) A = 2000 (1 + 0.10) ^ 2 A = 2000 (1.10) ^ 2 A = 2000 * 1.21 A = Rs. 2420
The compound interest is then calculated by subtracting the initial principal from the accumulated amount:
Compound Interest = A - P Compound Interest = Rs. 2420 - Rs. 2000 Compound Interest = Rs. 420
So, the compound interest on an amount of Rs. 2000 at the rate of 10% per annum at the end of two years is Rs. 420.
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