Rohit invested a certain amount at the rate of 6 p.c.p.a. and obtained a simple interest of Rs 8,730 at the end of 3 years. What amount of compound interest would he obtain on the same amount at the same rate of interest at the end of 2 years?

Let the principal be Rs. x S.I = (P × R × T)/100 8730 = (x × 6 × 3)/100 x = 48500 Now, C.I. = P(1+ R/100)^{t} – P C.I. = 48500 (1 + 6/100)^{2} – 48500 C.I. = Rs. 5994.60

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- Vishal has certain sum of money with him. He invested 80% of the sum in scheme ‘X’ offering 15% p.a. simple interest for 8 years and received Rs. 2760 as interest. He then invested the amount received from scheme ‘X’ in scheme ‘Y’ for 2 years at 50% p.a., compound interest compounded annually. Find the amount received by Vishal from scheme B.
- A certain sum of money yields Rs. 3,310 as compound interest for 3 years at 10% per annum. The sum is (in rupees).
- Suresh earned an interest of Rs. 1667 on principal amount of Rs. 5200 at some rate of compound interest in 2 years. How much more/less interest would he have earned on Rs. 5700 at the same rate of simple interest for the same duration?
- A sum fetched a simple interest of ₹3,040 at the rate of 8 %.p.a. in 5 years. What is the sum?
- Simple interest earned on an amount of Rs.1250 at rate of R% per annum after 2 years is Rs.225. Find the simple interest earned on an amount of Rs.1550 at rate of (R + 3)% per annum after 2 years.
- The amount of a certain sum in 3 years at simple interest at x % p.a. is ₹5,472 and the amount of the same sum in 7(1/2) years at the same rate, at simple interest is ₹6,930. The value of x is:
- Ajay invested Rs.a in SI at 7% rate of interest per annum for 12 years. Vishal invested the same amount in SI at 5% rate of interest per annum for 8 years and the difference between the interest obtained by Ajay and Vishal is Rs.2200. Find the amount invested by Vishal.
- If the compound interest on a certain sum of money for two years at 9% p.a. is ₹3,762, then the sum is:

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