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Ram had rupees 6800 he invested a part of money on 10% simple interest and remaining on 7.5% simple interest find the money invested at 10% per annum If he get rupees 1904 as interest after 3.5years A.1260 B.1360 C.1460 D.1700
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Ram had rupees 6800 he invested a part of money on 10% simple interest...
Solution:

Let the amount invested at 10% per annum be x
So, the amount invested at 7.5% per annum will be (6800 - x)

Given, the total interest earned after 3.5 years is Rs. 1904

Using the formula for simple interest, we get

Interest earned at 10% per annum = (x * 10 * 3.5) / 100
Interest earned at 7.5% per annum = ((6800 - x) * 7.5 * 3.5) / 100

Total interest earned = Interest earned at 10% per annum + Interest earned at 7.5% per annum

1904 = (x * 10 * 3.5) / 100 + ((6800 - x) * 7.5 * 3.5) / 100

Simplifying the above equation, we get

1904 = 0.35x + 0.2625(6800 - x)

1904 = 0.35x + 1785 - 0.2625x

0.0875x = 119

x = 1360

Therefore, the amount invested at 10% per annum is Rs. 1360

Hence, the answer is option B.
Community Answer
Ram had rupees 6800 he invested a part of money on 10% simple interest...
OPTIONS ARE WRONGRAM INVESTED Rs 5440 AT 10%pa AND GOT 1904 AS INTEREST
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Ram had rupees 6800 he invested a part of money on 10% simple interest and remaining on 7.5% simple interest find the money invested at 10% per annum If he get rupees 1904 as interest after 3.5years A.1260 B.1360 C.1460 D.1700
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