Rs 2000 are invested at 5% p.a simple interest. If the interest is added to the principal after every 10 years, the amount will become Rs 4000 after

S.I for 10 years = (2,000 × 5 ×10)/100 = Rs 1,000 Principal after 10 years becomes = Rs (2,000 + 1,000) = Rs 3,000 S.I on it = Rs 4,000 – 3,000 = Rs 1,000 Time = (100 × 1000)/(5 × 3000)= 6*2/3years Total time = 10 + 6 2/3years = 16*2/3years

- Sam invested a certain sum in scheme A for 5 years and in scheme B for 3 years, a sum which was double of that invested in scheme A. Both the schemes offer simple interest at the rate of 8% p.a. The difference between the amounts received from both the schemes was Rs. 12960. How much did Sam invest in scheme A?
- A man deposited Rs. 12000 at 10% compound interest, compounded annually while Rs. 10500 at 13% simple interest per annum. What will be the difference between the compound interest and the simple interest earned by him after 3 years?
- The difference between compound and simple interest on a sum of money for 2 years at 25% per annum is Rs. 880. The sum is:
- The simple interest received on a certain sum is Rs. 1200 less than the sum invested. If the sum was invested at 20% p.a. for 4 years, then find the simple interest received.
- A bank provides a loan at the rate of 5% per annum to a trader on an amount of 12,50,000 for 5 years. The simple interest to be paid is:
- Some amount out of Rs. 12000 was lent out at 10% per annum and the rest amount @ 16% per annum and thus in 5 years the total interest from both the amount collected was Rs. 7200. What is the amount which was lent out at 10% per annum?
- There is 40% increase in an amount in 8 years at simple interest. What will be the compound interest of Rs. 16,000 after 3 years at the same rate?
- Mr. Ghanshyam deposited certain amount in the Bank at the end of each year. How much amount did he deposit at the end of each year at the rate of 15% simple Interest, so that he will get Rs. 980 at the end of 4
^{th}year? - Neil buys a Camera priced at 32000. He pays 8000 at once and the rest after 15 months on which he is charges a simple Interest at the rate of 18% per annum. Then find the total amount he pays for the camera?
- The difference between compound interest and simple interest at rate of 22% per annum for 2 years is Rs. 484. Find the simple interest obtained on same amount for a period of 2 years at rate of 10% per annum.

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