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Pipes and Cisterns Practice Test 2 with solutions
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© examsnet.com
Question : 7
Total: 40
One pipe can fill a tank three times as fast as another pipe. If together the two pipes can fill the tank in 36 minutes, then the slower pipe alone will be able to fill the tank in:
192 min.
144 min.
108 min.
81 min.
Validate
Solution:
Let x and 3x minutes taken by the two pipes respectively to fill the tank, then
1
x
+
1
3
x
=
1
36
⇒
4
3
x
=
1
36
∴ x =
36
x
4
3
= 48 minutes
Hence, time taken by slower pipe = 3 × 48 = 144 minutes to fill the tank.
© examsnet.com
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