state gov Kolkata Police SI Mock Test 2023 Quantitative Aptitude Time and Work Pipe and Cistern

Two pipes A and B fill a tank in 36 and 48 minutes respectively. If both are opened simultaneously, after how much time should pipe B be closed so that the tank is full after 24 minutes?

1

12 minutes

2

8 minute

3

16 minutes

4

20 minutes

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