A cistern can be filled by a tap in 4 hours and by another in 3hours. How long will it take to fill if both taps are opened together?
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Answer:12/7 hours
Step-by-step explanation:
Time taken will be
1/3+1/4
3+4/12
7/12
It means it will take it 12/7hours
Or around 1 hour and 45 minutes.
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