2019 · Q45
A person divided a sum of Rs. 17,200 into three parts and invested at 5%, 6% and 9% per annum simple interest. At the end of two years, he got the same interest on each part of money. What is the money invested at 9%?
Elementary MathematicsSimple and Compound Interest
- ARs. 3,200
- BRs. 4,000
- CRs. 4,800
- DRs. 5,000
Explanation
Equal 2-year simple interest: 5p1 = 6p2 = 9p3 = k. With p1+p2+p3 = k(1/5+1/6+1/9) = 43k/90 = 17200, k = 36000. The 9% part is p3 = k/9 = Rs. 4,000.