A pipe can fill a cistern in 30 minutes and a waste-pipe can empty it in 1 hour. If both pipes are opened at once when the cistern is empty, how long will it take to fill the cistern?
Answers
Answered by
2
Answer:
sorry I didn't know this question is answered by them
I don't know
Step-by-step explanation:
Okay
Answered by
3
Answer:
1hrs
Step-by-step explanation:
- In 1 min pipe can fill 1/30 part
- In 1 min waste pipe can empty 1/60 part
- In both pipe are opened at once then 1/30-1/60
- 1/30-1/60=1/60
- 1/60 part can fill in 1 min
- 1 cistern can fill up in 60 min i.e 1 hrs...hope you got satisfied
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