Multiple choice

If the simple interest on $Rs.\ 1200$ be more than the interest on $Rs.\ 1000$ by $Rs.\ 30$ in $3$ years. Find rate percent per annum?

  1. $3\ \%$
  2. $4\ \%$
  3. $5\ \%$
  4. $6\ \%$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Difference in principal = 1200 - 1000 = 200. Interest difference = 30 over 3 years. Interest on 200 for 3 years = 30. Rate = (30 * 100) / (200 * 3) = 5%.

AI explanation

Using the simple interest formula, the difference in interest for 3 years is calculated as ((1200 x R x 3) / 100) minus ((1000 x R x 3) / 100), which equals Rs. 30. Simplifying this gives 36R minus 30R = 30, so 6R = 30. Solving for the rate gives 5 percent.

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