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RRB Paramedical Staff Nurse Model Paper 3
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© examsnet.com
Question : 41
Total: 100
Two pipes can fill a tank in 15 h and 20h respectively, while the third can tank empty it in 30h. If all the pipes are opened simultaneously, the empty tank will be filled in
10 h
12 h
15 h
31/2 h
Validate
Solution:
Given, part of tank filled by
A
=
15
h
Part of tank filled by
B
=
20
h
and part of tank emptied by
C
=
30
h
Then, part of tank filled in 1 h when all three pipes are opened simultaneously
=
1
15
+
1
20
−
1
30
=
4
+
3
−
2
60
=
5
60
=
1
12
Hence, the tank will be filled in 12 h.
© examsnet.com
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