Compound Interest

61 What would be the compound interest accrued on an amount of 4500 ₹ at the end of 2 years at the rate of 10 % per annum ?

62 If the simple interest for a certain sum for 2 years at 5% pa is ₹ 200, then what will be the compound interest for same sum for same period and at the same rate of interest?

63 Pratap borrowed a total amount of ₹32500 from his three friends Raj, Akash and Suresh. All of his friends apply different rates of interest in such a way that Raj applies 12%, Akash applies 16% and Suresh applies 18% interest rate respectively and total he gives ₹5090 as interest. If the amount that Pratap had taken from Raj is (18/25) of the amount taken from Suresh, then find that what amount Pratap has taken from Akash?

64 Find the least number of complete year in which a sum of money put out at 20% compound interest will be more than double:

65 Sudeshna took loan from Canara Bank for his 2 years course of MBA at IMD. He took the loan of ₹ 6 lakh such that he would be charged at 8% per annum at CI during his course and at 10% CI after the completion of course. He returned half of the amount which he had to be paid on the completion of his studies and remaining after 2 years. What is the total amount returned by Sudeshna?

66 A certain sum is invested for 2 years in scheme A at 20% p.a. compound interest compounded annually. Same sum is also invested for the same period in scheme B at x%p.a. to a simple interest earned from scheme A is twice of that earned from scheme B. What is the value of x?

67 ₹ 6100 was partly invested in Scheme A at 10% pa compound interest (compounded annually) for 2 years and partly in Scheme B at 10% pa simple interest for 4 years. Both the schemes earn equal interests. How much was invested in Scheme A ?

68 Singdha invested ₹ P for 2 years in scheme A which offered 20% per annum compound interest (compound annually). He lent the interest earned from scheme A to Shubh, at the rate of 7.5% per annum simple interest. If at the end of 2 years, Subh gave ₹ 3036 to Singdha and thereby repaid the whole amount (actual loan + interest), what is the value of P ?

69 Kajal took a loan of ₹ 15,00,000 to purchase a car. The organisation charges compound interest at 20% per annum. She promised to make the payment after three years. But for the last year of loan tenure, the organisation increased the rate of interest by 25% from the previous one. Then the extra amount which she had to pay is what per cent of the amount of loan taken by her? 

70 Three persons Suraj, Sanjay and Sekh invested different amounts in a fixed deposit scheme for one year at the rate of 12% per annum and earned a total interest of ₹ 3,240 at the end of the year. If the amount invested by Sanjay is ₹ 5000 more than the amount invested by Suraj and the invested by Sekh is ₹ 2000 more than the amount invested by Sanjay, what is the amount invested by Sanjay ?