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14. Compound Interest
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Q6 of 89 Page 14

Rachna borrowed a certain sum at the rate of 15% per annum. If she paid at the end of two years Rs. 1290 as interest compounded annually, find the sum she borrowed.

Given,


Rate = 15% p.a


Time = 2 years


C.I = Rs. 1290


Let principal = P


So,


Compound interest =


= P


=


=


=


Hence,


Principal = Rs. 4000


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4

What sum will amount to Rs. 4913 in 18 months, if the rate of interest is 12% per annum, compounded half-yearly?

5

The difference between the compound interest and simple interest on a certain sum at 15% per annum for 3 years is Rs. 283.50. Find the sum.

7

The interest on a sum of Rs. 2000 is being compounded annually at the rate of 4% per annum. Find the period for which the compound interest is Rs. 163.20.

8

In how much time would Rs. 5000 amount to Rs. 6655 at 10% per annum compound interest?

Questions · 89
14. Compound Interest
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