Rita invested a sum at 2.5% rate for 4 years. Sita invested the same amount at the same rate for 6 years. What is the ratio of the simple interest earned by Sita to that earned by Rita?
Question and options
Rita invested a sum at 2.5% rate for 4 years. Sita invested the same amount at the same rate for 6 years. What is the ratio of the simple interest earned by Sita to that earned by Rita?
- 3 : 2
- 2 : 3
- 1 : 3
- 1 : 4
Answer and explanation
Correct answer: A - 3 : 2
Simple interest = PRT/100, so with the same principal and rate it is proportional to time. Sita : Rita = 6 : 4 = 3 : 2; the ratio 2 : 3 is Rita's interest to Sita's, the reverse of what is asked.
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