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Pipes and Cisterns Practice Test 1 with solutions
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© examsnet.com
Question : 13
Total: 40
Two pipes A and B can fill a water tank in 20 and 24 minutes respectively and third pipe C can empty at the rate of 3 gallons per minute. If A, B and C opened together filled the tank in 15 minutes, the capacity (in gallons) of the tank is:
60
120
150
180
Validate
Solution:
👈: Video Solution
In 1 minute the part emptied by pipe C =
(
1
20
+
1
24
)
−
1
15
=
11
120
−
1
15
=
3
120
=
1
40
Hence, pipe C can empty the tank in 40 minutes.
Therefore, capacity of the tank = 40 × 3 = 120 gallons.
© examsnet.com
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