railway DMRC CRA Mock Test Series Quantitative Aptitude Time and Work Pipe and Cistern

A tank can be filled by tap A in 10 minutes and by tap B in 30 minutes. Both the taps are kept open for 5 minutes and then the tap A is shut off. After this, the tank, will be filled in what time?

1

25 minutes

2

15 minutes

3

10 minutes

4

20 minutes

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