A certain sum of money becomes double of itself in 15 years at a rate of simple

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Question
A certain sum of money becomes double of itself in 15 years at a rate of simple interest. In how many years will it become 5 times of itself at the same rate of simple interest
Options
A. 45
B. 37.5
C. 75
D. 60

Correct Answer

60

Simple Interest problems

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1. The simple interest on Rs.10 for 4 months at the rate of 3 paise per month is
Options
A. 0.3 Paise
B. 1.2 Paise
C. 30 Paise
D. 3 Paise

2. Avinash gave a sum of 5400 at the simple rate of interest of 8% to Rajeev for 4 years and Rajeev gave this amount to Chanukya at the rate of 6% for 4 years. Find how much extra amount has to be paid by Rajeev to Avinash after 4 years?
Options
A. Rs. 364
B. Rs. 432
C. Rs. 498
D. Rs. 554

3. A sum of money at simple interest amounts to Rs. 415 in 2 years and to Rs. 514 in 4 years. The sum is ?
Options
A. Rs. 316
B. Rs. 251
C. Rs. 154
D. Rs. 294

4. An automobile financier claims to be lending money at S.I., but he includes the interest every six months for calculating the principal. If he is charging an interest of 8%, the effective rate of interest becomes ?
Options
A. 10.25 %
B. 8.16 %
C. 9.63 %
D. 0.16 %

5. A certain sum is invested at simple interest at 18% p.a. for two years instead of investing at 12% p.a. for the same time period. Therefore the interest received is more by Rs. 840. Find the sum ?
Options
A. Rs. 5858
B. Rs. 8800
C. Rs. 7000
D. Rs. 6350

8. A sum of Rs. 10,000 is lent partly at 6% and the remaining at 10% p.a. If the yearly interest on the average is 9.2%, the money lent at 10% is:-
Options
A. Rs. 8000
B. Rs. 8500
C. Rs. 5000
D. Rs. 2000

10. On a certain Principal if the Simple interest for two years is Rs 4800 and Compound interest for the two years is Rs 5088, what is the rate of Interest?
Options
A. 6 percent
B. 24 percent
C. 12 percent
D. 18 percent

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