Multiple choice

Sunita invested Rs. 12,000 on simple interest at the rate of 10% p.a. to obtain a total amount of Rs. 20,400 after a certain period. For how many years did she invest to obtain the above amount?

  1. 9

  2. 7

  3. 6

  4. 8
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Using simple interest formula SI = P×R×T/100, where SI = Amount - Principal = 20,400 - 12,000 = 8,400. Substituting: 8,400 = 12,000 × 10 × T / 100, which gives 8,400 = 1,200 × T, so T = 7 years.

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