


1.
Find the simple interest on Rs. 68,000 at 16 2/3% per annum for 9 months.
2.
Find the simple interest on Rs. 3000 at 6 1/4 % per annum for the period from 4th Feb., 2005 to 18th April, 2005.
Answer & Solution
Answer: c) Rs. 37.50
Solution: Time = (24 + 31 + 18) days = 73 days = 73/365 year = 1/5 year. P = Rs. 3000 R = 6 1/4 % p.a. = 25/4 % p.a. S.I = Rs. [3000 * (25/4) * (1/5) * (1/100)] = Rs. 37.50 [Remark: The day on which money is deposited is not counted while the day on which money is withdrawn is counted] 3.
A sum at simple interest at 13 1/2 % per annum amounts to Rs. 2502.50 after 4 years. Find the sum.
4.
A sum of Rs. 800 amounts to Rs. 920 in 3 years at simple interest. If the interest rate is increased by 3%, it would amount to how much?
5.
Adam borrowed some money at the rate of 6 % p.a. for the first two years, at the rate of 9 % p.a. for the next three years, and at the rate of 14 % p.a. for the period beyond five years. If he pays a total interest of Rs. 11,400 at the end of nine years, how much money did he borrow? [Bank P.O. 1999]
6.
A certain sum of money amounts to Rs. 1008 in 2 years and to Rs. 1164 in 3 1/2 years. Find the sum and the rate of interest.
7.
At what rate percent per annum will a sum of money double in 16 years? [R.R.B. 2003]
