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

An inlet pipe can fill an empty tank in 2 hours and an outlet pipe can empty the full tank in 3 hours. In what time will the empty tank get filled, if the inlet and the outlet pipes are opened together?

1
3/2 h
2
3 h
3
6 h
4
2 h
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