Compound Interest (Railway Maths) (Part – III)

Total Questions: 50

21. At what rate of compound interest per annum will a sum of Rs. 1,500 become Rs. 1,591.35 in 2 years ? [RRB NTPC 13/03/2021 (Evening) ]

Correct Answer: (a) 3%
Solution:

22. Divide Rs. 20,609 between A and B, such that the amount (in Rs.) of A after 7 years is equal to the amount (in Rs.) of B after 9 years, if the interest being compounded yearly at 3% per annum. [RRB NTPC 15/03/2021 (Morning)]

Correct Answer: (a) A = Rs. 10,609, B = Rs. 10,000
Solution:

23. Sunil and Kamal took loan of Rs. 40,000 each for 1 year 6 months from a moneylender who charged simple interest from Sunil @ 11% per annum and compound interest from Kamal @ 10% per annum compounded semi-annually. Who paid more interest and by what amount? [RRB NTPC 15/03/2021 (Evening)]

Correct Answer: (b) Sunil paid Rs. 295 more
Solution:

24. Rs. 4,800 becomes Rs. 6,000 in 4 years at a certain rate of compound interest. What will be the amount after 12 years at the same rate of compound interest? [RRB NTPC 21/03/2021 (Evening)]

Correct Answer: (d) Rs. 9,375
Solution:

25. The value of a car depreciates at the rate of 12% per annum. Its present value is Rs. 7,74,400. What was the value of the car 2 years ago? [RRB NTPC 27/03/2021 (Evening)]

Correct Answer: (d) Rs. 10,00,000
Solution:

26. A sum of money invested at a certain rate of interest compounded annually amounts to Rs.729 in 4 years and Rs.1,331 in 7 years. Find the annual rate of interest. [RRB NTPC 01/04/2021 (Evening) ]

Correct Answer: (c)
Solution:

27. The compound interest on Rs.5,000 for 2 years is Rs.253.125. What would be the interest if the same sum is invested for the same duration at the same rate of simple interest ? [RRB NTPC 01/04/2021 (Evening) ]

Correct Answer: (a) Rs.250
Solution:

28. At what rate percent year compound interest does a sum of money becomes 9/4 times of itself in 2 years? [RRB NTPC 03/04/2021 (Evening) ]

Correct Answer: (a) 50%
Solution:

29. The difference between the compound and the simple interests on a certain sum of money for two years, at 5% per annum, is Rs. 1. The Sum is : [RRB NTPC 05/04/2021 (Morning) ]

Correct Answer: (c) Rs. 400
Solution:

30. Find the answer of given question? [RRB NTPC 06/04/2021 (Evening) ]

Correct Answer: (c) Rs. 25,600
Solution: