Multiple choice

In how many years does the sum of Rs. 1200 become Rs. 1800 at the rate of simple interest of 5% per annum?

  1. 10

  2. 20

  3. 15

  4. 25

  5. 30
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A Correct answer
Explanation

Simple interest = 1800 - 1200 = 600. Using SI = P*R*T/100, 600 = 1200 * 5 * T / 100. 600 = 60T, so T = 10 years.

AI explanation

Using the simple interest formula SI = (P * R * T) / 100, the interest earned is 1800 - 1200 = 600. Substituting the known values gives 600 = (1200 * 5 * T) / 100. Solving for T yields 600 = 60T, so T equals 10 years.

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