Exams › SSC CGL (Prelims) › General
A person invested a total sum of ₹2700 in three different schemes of simple interest at 3%, 4%, and 6% per annum. At the end of one year, he got the same interest from all three schemes. What was the amount (in ₹) invested at 4%?
- ₹ 1200
- ₹ 900
- ₹ 600
- ₹ 800
Correct answer: ₹ 900
Solution
If the interest earned in one year is the same, then principal amounts are inversely proportional to the rates. So the investments are in the ratio $\frac{1}{3}:\frac{1}{4}:\frac{1}{6}=4:3:2$. Their sum is 9 parts, equal to ₹2700, so 1 part = ₹300. Hence the amount at 4% is 3 parts = ₹900.
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