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SSC CGL Tier 2 Exam 21 Sep 2014 Paper
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© examsnet.com
Question : 95
Total: 100
If the compound interest on a sum for 2 years at
12
1
2
p.a is ₹ 510, the simple interest on the same sum at the same rate for the same period of time is
₹ 400
₹ 450
₹ 460
₹ 480
Validate
Solution:
(4) Principal = Rs. P (let)
∴ C.I.
=
P
[
(
1
+
R
100
)
T
−
1
]
⇒
510
=
P
[
(
1
+
25
200
)
2
−
1
]
⇒
510
=
P
[
(
1
+
1
8
)
2
−
1
]
⇒
510
=
P
[
(
9
8
)
2
−
1
]
⇒
510
=
P
(
81
64
−
1
)
⇒
510
=
P
(
81
−
64
64
)
⇒
510
=
17
P
64
⇒
P
=
510
×
64
17
=
R
s
.1920
∴ S.I.
=
Principal
×
Time
×
Rate
100
=
1920
×
2
×
25
100
×
2
=
Rs. 480
© examsnet.com
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