10. Pipe A can fill a tank in 30 mins and Pipe B can fill it in – McqOptions

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1.	10. Pipe A can fill a tank in 30 mins and Pipe B can fill it in 45 mins. If both are opened together, then after how much time must B be turned off so that the tank gets filled in 24 mins.
A.	9 mins
B.	12 mins
C.	18 mins
D.	16 mins
Answer» B. 12 mins

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