### Exercise :: Simple Interest - General Questions

- Simple Interest - Important Formulas
- Simple Interest - General Questions
- Simple Interest - Data Sufficiency 1
- Simple Interest - Data Sufficiency 2

11. | A sum of money amounts to Rs. 9800 after 5 years and Rs. 12005 after 8 years at the same rate of simple interest. The rate of interest per annum is: |
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Answer: Option C Explanation: S.I. for 3 years = Rs. (12005 - 9800) = Rs. 2205.
Principal = Rs. (9800 - 3675) = Rs. 6125.
Video Explanation: https://youtu.be/UYwiBCRN39s |

12. | What will be the ratio of simple interest earned by certain amount at the same rate of interest for 6 years and that for 9 years? |
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Answer: Option C Explanation: Let the principal be P and rate of interest be R%.
Video Explanation: https://youtu.be/GaaEDwTWc6w |

13. | A certain amount earns simple interest of Rs. 1750 after 7 years. Had the interest been 2% more, how much more interest would it have earned? |
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Answer: Option D Explanation: We need to know the S.I., principal and time to find the rate. Since the principal is not given, so data is inadequate. |

14. | A person borrows Rs. 5000 for 2 years at 4% p.a. simple interest. He immediately lends it to another person at 6% p.a for 2 years. Find his gain in the transaction per year. |
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Answer: Option A Explanation:
Video Explanation: https://youtu.be/zBjcwqIcmL4 |