Multiple choice

How much time will it take for an amount of Rs. $450$ to yield Rs. $81$ as interest at $4.5\%$ per annum of simple interest?

  1. $3$ yrs
  2. $3.5$ yrs
  3. $4$ yrs
  4. $4.5$ yrs
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Simple Interest (SI) = (P * R * T) / 100. Given 81 = (450 * 4.5 * T) / 100. 81 = 20.25 * T. T = 81 / 20.25 = 4 years.

AI explanation

Using the simple interest formula Time equals Interest divided by (Principal times Rate), we substitute the given values as 81 divided by (450 times 0.045). The denominator becomes 20.25, and dividing 81 by 20.25 gives exactly 4 years.

Keep practicing — related questions