Question:

Raj invested a certain sum of money in two schemes. The first scheme offers a simple interest of 10% per annum, and the second scheme offers a simple interest of 12% per annum. If the total interest earned from both schemes after 3 years is Rs. 1980, and the ratio of the amounts invested in the two schemes is 5:4, what is the amount invested in the second scheme?

Updated On: Aug 23, 2024
  • 2500
  • 2300
  • 2700
  • 2900
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The Correct Option is C

Solution and Explanation

Let the amounts invested in the first and second schemes be 5x and 4x respectively.

Interest from the first scheme:

Principal (P1) = 5x

Rate (R1) = 10%

Time (T) = 3 years

Simple Interest \(SI1 = \frac{P1 \times R1 \times T}{100} = \frac{5x \times 10 \times 3}{100} = 1.5x\)

Interest from the second scheme:

Principal (P2) = 4x

Rate (R2) = 12%

Time (T) = 3 years

Simple Interest \(SI2 = \frac{P2 \times R2 \times T}{100} = \frac{4x \times 12 \times 3}{100} = 1.44x\)

Total interest \(= SI1 + SI2 = 1.5x + 1.44x = 2.94x\)

Given, total interest = Rs. 1980

So, 2.94x = 1980

=> \(x = \frac{1980}{2.94} = 675\)

Amount invested in the second scheme = \(P2 = 4x = 4 \times 675 = \text{Rs. 2700}\)

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