A certain amount earns simple interest of Rs. 1840 after 5 years. Had the interest been 4% more, how much more interest would it have earned?

When we solve this question, we find that we have two variables P (Principal) and R (Initial assumed rate of interest) in the R.H.S. of the SI equation. Therefore, the correct answer can't be determined.

- A man deposited Rs. ‘x + 700’ at 12% per annum simple interest and earned Rs. 624 as interest after 2 years. Find the interest earned by him if he deposited Rs. 2x at 10% per annum for 2 years at compound interest.
- The simple interest received after 5 years on Rs. (x + 500) at the rate of 20% p.a. is Rs. (2x – 1500). The amount received on Rs. 3x when invested at 40% p.a. compound interest, compounded annually for 2 years can be:
- A man buys a laptop at Rs. 18,000. He pays Rs.6,000 at once and the rest after 18 months on which he is charging a simple interest at the rate of 15% per annum. The total amount he pays for the laptop is
- If a sum when placed at compound interest grows to Rs.6,400 in 2 yrs and to Rs. 8,000 in 3 yrs, find the rate percent p.a.
- 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? - The simple interest received on a certain sum is Rs. 250 less than the sum invested. If the sum was invested at 15% p.a. for 4 years, then find the simple interest received.
- A man invested a certain amount of sum at 5% per annum simple interest and earned an interest of Rs. 2500 after 5 years. If the same amount is invested at 15% per annum compound interest, compounded annually for two years then the interest would be:
- A man wants to invest Rs. 60660 in bank accounts of his two sons whose ages are 12 years and 16 years in such a way that they will get equal amount at an age of 120 years @ 33(1/3) per annum compounded annually. Find the share of elder son?
- The difference between compound interest and simple interest at rate of 16% per annum for 2 years is Rs. 192. Find the simple interest obtained on same amount for a period of 2 years at rate of 10% per annum.
- A man wants to invest Rs. 60660 in bank accounts of his two sons whose ages are 12 years and 16 years in such a way that they will get equal amount at an age of 120 years @ 33(1/3)% per annum compounded annually. Find the share of elder son?

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