Two pipes can fill a cistern in 6 minutes and 7 minutes respectively. – McqOptions

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1.	Two pipes can fill a cistern in 6 minutes and 7 minutes respectively. Both the pipes are opened alternately for 1 minute each. In what time will they fill the cistern?
A.	5 minutes
B.	17/3 times
C.	45/7 minutes
D.	5/4 minutes
Answer» D. 5/4 minutes

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