##### Simple, Compound Interest and Principal Page-2

9) A man invested Rs. 40,000 in a building society which paid simple interest at a rate of 7 1/4 % per annum to its investors. After 2 years, the rate was increased to 7.6% per annum. Find the amount he had at the end of 7 years.
(A) Rs. 50,000
(B) Rs. 60,000
(C) Rs. 61,000
(D) Rs. 71,000

10) Find the simple interest you will obtain if you deposit Rs. 600 in a bank for 9 months at 4 1/2% per annum.
(A) 20.25
(B) 21.25
(C) 22.25
(D) 24.25

11) How long will it take a principal of Rs. 24000 to amount to Rs. 28,000 at a simple interest rate of 6% per annum?
(A) 3 years 4 months
(B) 4 years 3 months
(C) 4 years 4 months
(D) 3 years 3 months

12) If the simple interest on a sum of money invested at 3 1/2% per annum for 4 years is Rs. 1000. Find the principal?
(A) 7141.90
(B) 7142.90
(C) 7143.90
(D) 7144.90

13) Simple interest on Rs. 400 in 3 years at a rate of 5% per annum is
(A) Rs. 70
(B) Rs. 80
(C) Rs. 60
(D) Rs. 30

14) Find the principal which amounts, at simple interest to Rs. 729 in 4 years at 2% per annum.
(A) Rs. 665
(B) Rs. 675
(C) Rs. 685
(D) Rs. 696

15) The simple interest on a certain sum for nine months at 5% per annum is Rs. 125 less than the simple interest on the same sum for 15 months at 4% per annum. Find the principal
(A) Rs. 15,000
(B) Rs. 20,000
(C) Rs. 1000
(D) Rs. 10,000

16) The simple interest on a certain sum for 8 months at 4 percent simple interest is Rs. 129 less than the simple interest on the same sum for 15 moths at five percent. The sum is
(A) Rs. 2800
(B) Rs. 2400
(C) Rs. 3200
(D) Rs. 3600