Arithmetic

Simple & Compound Interest

Easy

At what rate of compound interest per annum, a sum of Rs 1800 becomes Rs 2178 in two years?

13%

12%

11%

10%

✅ Correct Option: 4

Using $A = P(1 + r)^2$ , we get $(1 + r)^2 = 2178/1800 = 1.21$ . Taking the square root, $1 + r = 1.1$ , so $r = 0.1$ , that is 10% per annum.

2026: 26 May Shift 1

Simple interest on a certain sum of money for 3 years at 8% per annum is half of the compound interest on ₹ 6000 for 2 years at 10% per annum. Find the sum on which simple interest is calculated ?

2025: 13 May Shift 2

Mr. X invested one fourth of his capital at 8%, one third at 7% and the remaining part at 10%. If his annual simple interest on this investment is Rs 510, then the total capital invested by Mr. X is?

2026: 21 May Shift 2

A bank lends money at 12% per annum on simple interest. A customer borrows ₹ 50,000 for 9 months and repays after receiving a 5% rebate on total interest amount. What effective annual interest rate did he pay?

2022: 23 Aug Shift 1

The simple interest as a sum of money is $\frac{4}{5}$ of the principal. Find the rate of interest if both the rate of interest and time are numerically equal.

2022: 8 Aug Shift 1

If P = Rs. 2000, R = 5% per annual, T = 5 year

A. Total sum of amount = Rs. 2200

B. SI = Rs. 200

C. SI = Rs. 500

D. Total sum of amount = Rs. 2500

Choose the correct answer from the potions given below:

2023: 15 June Shift 2

Rs. 800 becomes Rs. 956 in 3 years at a certain rate of simple interest. If the rate of interest is increased by 4%, what will Rs. 800 amount to in 3 years:

At what rate of compound interest per annum, a sum of Rs 1800 becomes Rs 2178 in two years?

Solution

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