Question

A cistern can be filled by a tap in 6hours and emptied by an outlet pipe in 8hours. How long will it take to fill the cistern if both the tap and pipe are turned on together?​

Answer 1

Answer:

It will take a day

That is 24 hours

Step-by-step explanation:

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Answer 2

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When we have question like one is filling the tank and other is empting it, then we subtraction as,

Filled in 1 hour = 1/6

Empties in 1 hour = 1/8

Net filled in 1 hour = 1/6 - 1/8

= (8-6)/48

= 2/48

=1/24

So cistern will be filled in 24 hours.