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

Answer: (C)

Rs. 7500

Answer 2

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)