91. Suresh lent out a sum of money to Rakesh for 5 years at simple interest. At the end of 5 years. Rakesh paid 9/8 of the sum to Suresh to clear out the amount. Find the rate of simple interest per annum.
92. A sum at a simple interest of 8% p.a. becomes $$\frac{7}{5}$$ of itself in how many years?
93. A man takes a loan of some amount at some rate of simple interest. After three years, the loan amount is doubled and rate of interest is decreased by 2%. After 5 years, if the total interest paid on the whole is Rs. 13,600, which is equal to the same when the first amount was taken for $$11\frac{1}{3}$$ years, then the loan taken initially is:
94. A person borrows Rs. 7,000 for 3 year's at 5% p.a. simple interest. He immediately lends it to another person at $$6\frac{1}{3}\% $$ p.a. for 3 years. Find the gain in the transaction per year.
95. What annual instalment will discharge a debit of Rs. 5,664 in 4 years at 12% simple interest?
96. A sum at simple interest becomes two times in 8 years at a certain rate of interest p.a. The time in which the same sum will be 4 times at the same rate of interest at simple interest is:
97. What annual installment will discharge a debt of Rs. 3,270 due in 3 years at 9% per annum simple interest?
98. If the annual rate of simple interest increase from 11% to $$17\frac{1}{2}\% ,$$ then a person's yearly income increase by Rs. 1,071.20. The simple interest (in Rs.) on the same sum at 10% for 5 year is:
99. A sum of Rs. 36,000 is divided into two parts A and B, such that the simple interest at the rate of 15% p.a. on A and B after two years and four years, respectively, is equal. The total interest (in Rs.) received from A is:
100. If the simple interest on a sum of Rs. P at 5% per annum for three years is thrice the simple interest received on Rs. Q at 7% per annum for four years, then find the relation between P and Q.
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