Two pipes A and B can fill a cistern in 75/2 minutes and 45 minutes re – McqOptions

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1.	Two pipes A and B can fill a cistern in 75/2 minutes and 45 minutes respectively. both pipes are opened.the cistern will be filled in just half an hour, if the pipe B is turned off after _____________
A.	10 MIN
B.	9 MIN
C.	15 MIN
D.	5MIN
Answer» C. 15 MIN

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