Simple Interest (Railway Maths) (Part – II)

Total Questions: 50

11. A sum of money was invested at simple interest at r% per annum for 3 years. Had the rate of interest been (r + 2)%, it would have fetched ₹84 more. Find the sum invested. [Level 2 (13/06/2022) Shift 2]

Correct Answer: (d) ₹1,400
Solution:

12. Determine the number of months required to get Rs 25.5 as simple interest on Rs 850 at 3.6% per annum. [Level 3 (14/06/2022) Shift 1]

Correct Answer: (a) 10 months
Solution:

13. On simple interest a certain sum becomes 160% of itself in 5 years at a certain rate of interest per annum. In how many years will the sum double itself under the same rate of interest? [Level 5 (15/06/2022) Shift 2]

Correct Answer: (c)
Solution:

14. At a certain rate of simple interest per annum a sum of money amounts to 13/8 of itself in 10 years. What is the rate of simple interest per annum? [Level 5 (15/06/2022) Shift 3]

Correct Answer: (a) 6.25%
Solution:

15. A sum of ₹9,200 was lent partly at 5% p.a. and the rest at 8% p.a., both earning simple interest. Total interest received after 3 years was ₹1,812. The sum (in ₹) lent at 5% p.a. was: [Level 2 (16/06/2022) Shift 1]

Correct Answer: (c) ₹4,400
Solution:

16. Find the simple interest on Rs 48,750 at 16% per annum for 73 days of a non-leap year. [Level 2 (16/06/2022) Shift 2]

Correct Answer: (a) 1,560
Solution:

17. A sum of money, when invested at 14.5% p.a. simple interest amounts to ₹13,464 after 6 years. What was the sum invested? [Level 3 (17/06/2022) Shift 1]

Correct Answer: (c) ₹7,200
Solution:

18. A sum of ₹14,500 was invested at 9% per annum simple interest for a few years. The interest accrued during this period was ₹7,830. What was the period of investment? [Level 3 (17/06/2022) Shift 2]

Correct Answer: (c) 6 year
Solution:

19. A sum of money of Rs. 2,600.00 was lent out in two parts in such a way that the simple interest on the first part at 10% per annum for 5 years is the same as the interest of the second part at 9% per annum for 6 years. The part lent out at 10% is: [RRB NTPC 28/12/2020 (Evening)]

Correct Answer: (c) Rs. 1,350.00
Solution:

20. A sum of Rs. 5,000 was lent partly at 5% simple interest per annum and partly at 10% simple interest per annum. Total interest received after 5 years was Rs. 1,750. Find the amount of money that was lent out at 10% simple interest per annum. [RRB NTPC 29/12/2020 (Morning)]

Correct Answer: (c) Rs. 2,000
Solution: