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Compound Interest
The difference between simple and compound interests compounded annually on a certain sum of money for 2 years at 4% per annum is Re. 1. The sum (in Rs.) is:
625
630
640
650
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Correct Answer:
625
Explanation:
Let the sum be Rs.
x
. Then,
C.I. =
[
x
❨
1 +
4
❩
2
-
x
]
=
❨
676
x
-
x
❩
=
51
x
.
100
625
625
S.I. =
❨
x
x 4 x 2
❩
=
2
x
.
100
25
∴
51
x
-
2
x
= 1
625
25
⟹
x
= 625.
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