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UPSC CDS Math Ratio Proportion and Variation Questions
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© examsnet.com
Question : 2
Total: 20
The train fare and bus fare between two stations is in the ratio 3 :4. If the train fare increases by 20% and bus fare increases by 30%, then what is the ratio between revised train fare and revised bus fare ?
[2019 CDS-II]
9
13
17
12
32
43
19
21
Validate
Solution:
Let the train and bus fair are
3
x
and
4
x
.
Train fare increased by
20
%
and bus fair increased by
30
%
.
So new fair of train
1.2
×
3
x
=
3.6
x
and new fair of bus
=
1.3
×
4
x
=
5.2
x
So, the ratio
=
3.6
x
5.2
x
=
9
13
=
9
:
13
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