One tap can fill a cistern in 2 hours and another can empty the cistern in 3 hours. How long will they take to fill the cistern if both the taps are opened ?

One tap can fill a cistern in 2 hours and another can empty the cister

1.	One tap can fill a cistern in 2 hours and another can empty the cistern in 3 hours. How long will they take to fill the cistern if both the taps are opened ?
A.	5 hours
B.	6 hours
C.	7 hours
D.	8 hours
Answer» C. 7 hours

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One tap can fill a cistern in 2 hours and another can empty the cistern in 3 hours. How long will they take to fill the cistern if both the taps are opened ?

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