Question

9842.
Hence, the required compound interest is 9842.
EXERCISE 8 D
1. Find the amount and the compound interest on 120000 at 8% per annum for 1 year, compounded
half-yearly.
2. Find the amount and the compound interest on 32500 for 1 year; at 12% per annum, compounded
half yearly.
1
1 years at 10% per annum,
compounded half-yearly.
4. Calculate the amount and the compound interest on 10000 for 6 months at 12% per annum,
compounded quarterly.
5. Calculate the amount and the compound interest on 15625 for 9 months at 16% per annum,
compounded quarterly.
6. Calculate the amount and the compound interest on 2560000 for 1 year at 10% per annum,
compounded quarterly.
121​

Answer 1

According to the question,

P = Rs. 15625, r = 16% per annum = 16%/4 per quarter = 4% per quarter.

n = 9 months = 3 quarters.

Amount = P(1 + r/100)n = 15625(1 + 4/100)3 = Rs. 17576.

Interest = A - P = 17576 - 15625 = Rs. 1951.

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