A cistern can be filled by a tap in 4 hours and emptied by an outlet in 8 hours.
How long will it take to fill the cistern if both the taps and the pipe are opened
together?
post explanation please
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Answer:
Total time taken to fill the cistern = 12 hrs.
Step-by-step explanation:
A cistern can be filled by a tap in 4 hrs
A cistern can be filled by a tap in 1 hr = 1/4
A cistern emptied by an outlet pipe in 6 hrs
A cistern emptied by an outlet pipe in 1 hr =1/6
Time taken to fill the cistern if both taps are opened together in 1 hr = 1/4-1/6=1/12
Total time taken to fill the cistern = 12 hrs.
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