A cistern can be filled by a pipe in 5hrs and emptied by another pipe in 8hrs.
i)If both the pipes are opened together, what time be the empty cistern be full.
ii)If the cistern can hold 200 L, how long would it be before exactly 30 L had sun in ?
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Answer:
1.Pipes A and B can fill a tank in
5
and
6
hours respectively. Pipe C can empty it in
12
hours. If all the three pipes are opened together, then the tank will be filled in:
A.
2
8
11
hours
B.
1
13
17
hours
C.
4
1
2
hours
D.
3
9
17
hours
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2.Two pipes A and B can fill a cistern in
37
1
2
minutes and
45
minutes respectively. Both pipes are opened. The cistern will be filled in just half an hour, if pipe B is turned off after:
A.
10
min
B.
5
min
C.
9
min
D.
15
min
Step-by-step explanation:
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