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UPSC 2017 CDS II Math Paper
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© examsnet.com
Question : 29
Total: 100
Five years ago, Ram was three times as old as Shyam. Four years from now, Ram will be only twice as old as Shyam. What is the present age of Ram ?
[2017 CDS-II]
30 years
32 years
36 years
40 years
Validate
Solution:
Let the present age of Ram be x years
∴
x
−
5
=
3
(Present age of Shyam - 5)
⇒ Present age of Shyam
=
x
+
10
3
years
Also,
x
+
4
=
2
(
x
+
10
3
+
4
)
⇒
x
+
4
=
2
3
x
+
44
3
⇒
1
3
x
=
44
3
−
4
=
32
3
⇒
x
=
32
© examsnet.com
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