Arithmatical - Simple Interest
DIRECTIONS : Problems based on Simple Interest.
21. |
The rates of simple interest in two banks A and B are in the ratio 5 : 4. A person wants to deposit his total savings in two banks in such a way that he received equal half yearly interest from both. He should deposit the savings in banks A and B in the ratio |
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A. 2 : 5 |
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B. 4 : 5 |
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C. 5 : 2 |
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D. 5 : 4 |
Solution |
Let the savings be X and Y and the rates of simple interest be 5x and 4x respectively. Then, |
‹=›X x 5x x 1/2 x 1/100 |
‹=›Yx4xx1/2x1/100 |
‹=›X/Y = 4/5 |
X : Y = 4 : 5. |
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22. |
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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A. Rs.35 |
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B. Rs. 50 |
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C. Rs.80 |
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D. Cannot be determined |
Solution |
We need to know the S.I., principal and time to find the rate. Since the principal is not given, so data is inadequate. |
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23. |
A sum fetched a total simple interest of Rs. 4016.25 at the rate of 9 p.c.p.a. in 5 years. What is the sum? |
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A. Rs. 4462.60 |
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B. Rs. 8032.50 |
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C. Rs. 8900 |
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D. Rs. 8925 |
Solution |
Principal | = Rs.(100x4016.25/9x5) |
= Rs. (401625 / 45). |
= Rs. 8925. |
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