Question

two pipes can separately fill a cistern in 5 hours and 6 hours respectively ,and a third pipe can empty it in 10 hours how long would it take for the cistern if all the pipes were used together​

Answer 1

Answer:

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Step-by-step explanation:

Pipe A alone can fill the cistern in  

37

1

2

=

75

2

minutes. Since it was open for  

30

minutes, part of the cistern filled by pipe A

=

2

75

×

30

=

4

5

So the remaining  

1

5

part is filled by pipe B.

Pipe B can fill the cistern in 45 minutes. So, time required to fill  

1

5

part

=

45

5

=

9

minutes.

i.e., pipe B is turned off after 9 minutes.