1. Calculate the compound interest on rupee 18,000 at 10% per annum in two years.
2. Calculate the difference between the simple interest and the compound interest on rupee 4,000 in 2 years at 8% per annum compounded yearly.
3. Calculate the amount and the compound interest on rupee 16,000 in 3 years, when the rates of the interest for successive years are 10%,14% and 15% respectively.
4. Calculate the amount and the compound interest on rupee 12,000 in 3 years when the rates of interest for successive years are 8%, 10%, and 15% respectively.
5. On what sum of money will compound interest for 2 years at 5 percent per year amount to rupee 164?
6. At what rate percent per annum will rupee 6,000 amount to rupee 6,615 in 2 years when interest is compounded annually.
7.
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2
Answer:
P = 18000 ; R = 10%, T=2.5.
So Let T = 2
A=18000(1+
100
10
)
2
18000(11/10)
2
=21780.
Interest after 2 years
=21780−18000=3780
Interest after half year
=21780×
100
10
×
2
1
=1089
Total interest after 2.5 year
3780+1089=4869.
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