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SSC CHSL 24-March-2018 Shift 2 Paper
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© examsnet.com
Question : 11
Total: 100
A sum of Rs 1200 amounts to Rs 1740 in 3 years at simple interest. If rate of interest is increased by 3%, then what will be the new amount (in Rs)?
1848
1946
1812
1924
Validate
Solution:
Principal sum = Rs. 1200 and amount after 3 years = Rs. 1740
Let rate of interest =
4
r
%
Amount under simple interest =
P
+
(
P
×
R
×
T
100
)
⇒
1200
+
(
1200
×
r
×
3
100
)
=
1740
⇒
36
r
=
1740
−
1200
=
540
⇒
r
=
540
36
=
15
%
Thus, new rate of interest =
15
+
3
=
18
%
∴ New amount =
1200
+
(
1200
×
18
×
3
100
)
=
1200
+
648
=
R
s
.
1848
© examsnet.com
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