Compound Interest (Railway Maths) (Part – IV)

Total Questions: 23

11. If the principal is Rs.26000 Find the total amount at compound interest rate after 3 years at the rate of 10% per year. (In Rupees) [RPF Constable 19/01/2019 (Morning) ]

Correct Answer: (b) 34606
Solution:

12. The difference between the compound interest and the simple interest on the same sum of money invested at the same rate for 2 years is ₹32. If the rate of interest is 4% per annum, then calculate the amount invested (in ₹)? [RPF S.I. 19/12/2018 (Morning)]

Correct Answer: (c) 20000
Solution:

13. The difference between the amount of interest received on the same amount invested at compound interest and simple interest at the same rate of interest for two years is ₹36. If the rate of interest is 4% per annum, then calculate the amount invested (in ₹)? [RPF S.I. 19/12/2018 (Evening)]

Correct Answer: (d) 22500
Solution:

14. The difference between the amounts of compound interest and simple interest received on the same sum in two years is ₹40. If the rate of interest is 4% per annum, then calculate the amount invested (in ₹). [RPF S.I. 24/12/2018 (Morning) ]

Correct Answer: (d) 25000
Solution:

15. A sum of money at compound interest becomes twice the principal amount in 3 years. In how many years will it become 64 times of its original amount? [RPF S.I. 24/12/2018 (Morning)]

Correct Answer: (d) 18
Solution:

16. The difference between earned interest on the same amount invested for 2 years on compound interest and simple interest is Rs.76. If interest rates are 4% per year, then calculate the amount invested. (in rupees) [RPF S.I. 05/01/2019 (Morning)]

Correct Answer: (b) 47,500
Solution:

17. A sum of money at compound interest becomes three times the principal amount in 4 years. In how many years will it become 9 times the original amount? [RPF S.I. 06/01/2019 (Afternoon)]

Correct Answer: (d) 8
Solution:

18. The difference between the amounts of compound interest and simple interest received in two years on the same amount at the same rate of interest is Rs 60, if the rate of interest is 4% per annum, calculate the amount invested. (in Rs.) [RPF S.I. 10/01/2019 (Morning) ]

Correct Answer: (d) 37,500
Solution:

19. Simple interest on a certain sum of money for 3 years at 5% per annum is ₹5250. What will be the compound interest on that sum at the same rate for the same period? [RRB ALP 10/08/2018 (Afternoon)]

Correct Answer: (d) ₹5,516.88
Solution:

20. If sum of ₹1000 amount to ₹1331 in 3 years, compounded annually. Then, find the rate of interest per annum? [RRB ALP 13/08/2018 (Afternoon)]

Correct Answer: (c) 10%
Solution: