50. One tap can fill a cistern in 2 hours and another tap can empty the cistern in 3 hours.How long will they take to fill the estern if both the taps are opened ?
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Answer:6 hours
Step-by-step explanation:
Time taken =1/2+1/3
=3-2/6
=1/6
Now, this will be divided by 1 which will result as 6 hours
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