Question

find the time if the interest on rupees 2,500 is rupees 500 at the rate of 10% per annum ​

Answer 1

$si \: = \frac{p \times r \times t}{100} \\ 2500 = \frac{500 \times 10 \times t}{100} \\ 2500 = 50 \times t \\ \frac{2500}{50} = t \\ t = 5years$