Multiple choice

The simple interest on a sum of money will be Rs. 600 after 10 years. If the principal is tripled after 5 years, what will be the total interest at the end of the tenth year?

  1. Rs. 600

  2. Rs. 900

  3. Rs. 1,200

  4. Data inadequate
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

SI = P*R*T/100. 600 = P*R*10/100 => PR = 6000. Interest for first 5 years = P*R*5/100 = 6000*5/100 = 300. Principal becomes 3P. Interest for next 5 years = (3P)*R*5/100 = 3 * (P*R*5/100) = 3 * 300 = 900. Total interest = 300 + 900 = 1200.

AI explanation

The interest for the first 5 years is half of the 10-year interest, which equals 600 / 2 = Rs. 300. Since the principal is tripled after year 5, the interest for the next 5 years also triples to become 3 * 300 = Rs. 900. The total interest at the end of the tenth year is 300 + 900 = Rs. 1,200.

Keep practicing — related questions