state gov WBPSC Food SI Mock Test 2023 Quantitative Aptitude Time and Work Pipe and Cistern

A tank can be filled by pipe X in 2 hrs. and pipe Y in 6 hrs. At 10 a.m. ,pipe X was opened. At what time will the tank be filled if pipe Y is opened at 11 a.m?

1
12:45 p.m.
2
5:00 p.m.
3
11:45 a.m.
4
11:50 a.m.
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