If the simple interest earned at 10 percent per annum is Rs 1000 at the end of 5 years, then what should be the principal amount?

Correct option is A

Given:

Simple interest earned in 5 years at 10% per annum is 1000
Formula Used:
​$$\text{Simple Interest} = \frac{\text{Principal} \times \text{Rate} \times \text{Time}}{100}$$​
Solution:
​$$1000 = \frac{\text{Principal} \times 10 \times 5}{100}\\\text{Principal} = 2000$$​​