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 ?
Correct answer: C. 2 : 3
- A. 1 : 3
- B. 1 : 4
- C. 2 : 3
- D. Data inadequate
Explanation
For the same principal and rate, simple interest is directly proportional to time because SI = P x r x t. Therefore, the ratio for 6 years to that for 9 years is 6 years : 9 years = 2 : 3. Option d, data inadequate, is incorrect because the principal and rate cancel in the ratio.
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Percentages express a quantity as parts per hundred and support calculations involving increases, decreases, discounts, commissions, taxes, and successive changes. Questions require distinguishing percentage change from percentage points and identifying the original value when a final value and its percentage change are given.
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