Question

A man received Rs. 12000 as Puja Bonus. He invested a part of it at 5\(\%\) per annum and the remaining at 6\(\%\) per annum, simple interest being allowed in each case. The total interest earned by him in 4 years is Rs. 2580. The sum invested at 5\(\%\) per annum is

• A. Rs. 4500
• B. Rs. 4000
• C. Rs. 7500
• D. Rs. 8000

Answer 1

The Correct Option is C

Let the sum invested on \(5\%\) per annum be \(x\)

So, S.I. \(=\frac{prt}{100}\) [S.I. Simple Interest]

\(x\times5\times\frac{4}{100}+(12000-x)\times4\times\frac{6}{100}=2580\)

After Solving the equation, the value of \(x\)
\(x=\) \(Rs.\) \(7500\)
The correct option is (C)