other govt exam ISRO Assistant Mock Test 2022 Quantitative Aptitude Time and Work Pipe and Cistern

Two taps can fill a tub in 5 minutes and 7 minutes respectively. A pipe can empty it in 3 minutes. If all the three are kept open simultaneously, when will the tub be full?

1
60 minutes
2
85 minutes
3
90 minutes
4
105 minutes
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