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RRB Paramedical Staff Nurse Model Paper 3
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© examsnet.com
Question : 42
Total: 100
Three taps A, Band C together can fill an empty cistern in 10 min. The tap A alone can fill it in 30 min and the tap B alone in 40 min. How long will the tap C alone take to fill it?
16 min
24 min
32 min
40 min
Validate
Solution:
According to the question.
Part of the cistern filled by taps A,B and
C
in 1 min
=
1
10
Part of the cistem filled by taps B and C in 1 min
=
1
30
+
1
40
=
4
+
3
120
=
7
120
Thus, part of the cistem filled by tap C in 1 min
(
A
+
B
+
C
)
−
(
A
+
B
)
=
1
10
−
7
120
=
12
−
7
120
=
5
120
=
1
24
Hence tap C will fill the cistem in 24 min.
© examsnet.com
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