- Option : C
- Explanation :
**Hint:**First calculate that Rs 900 becomes Rs 1000 in fourth year. Calculate rate of interest by application of simple interest formula. Thereafter principal amount can also be calculated.

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- Option : A
- Explanation :
**Hint:**First initial R can be calculated, and then 3% added to it.

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- Option : A
- Explanation : We can solve this question directly.

The simple interest amount is same in both cases.

15 × 4 = 20 × 3

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