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Standard VIII
Mathematics
Formula for CI
Question
Find the compound interest for Rs.
1
,
000
for
4
years at
5
%
p.a. When the interest is compounded annually.
220
218
215
250
A
220
B
250
C
218
D
215
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Solution
Verified by Toppr
Interest for first year
=
1000
×
5
×
1
100
=
₹
50
Amount after first year
=
1000
+
50
=
₹
1050
Interest for second year
=
1050
×
5
×
1
100
=
₹
52.5
Amount after
second
year
=
1050
+
52.5
=
₹
1102.5
Interest for third year
=
1102.5
×
5
×
1
100
=
₹
55.125
Amount after third year
=
1102.5
+
55.125
=
₹
1157.625
Interest for fourth year
=
1157.625
×
5
×
1
100
=
₹
57.88125
Amount after fourth year
=
1157.625
+
57.88125
=
₹
1215.50625
Compound interest
=
1215.50625
−
1000
=
215.50625
=
₹
215
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