state gov UP Lekhpal Mock Test 2023 - 24 Quantitative Aptitude Time and Work Pipe and Cistern

Two pipes A and B can fill an empty cistern in 4 hours and 5 hours respectively. If both the pipes are simultaneously opened in an empty cistern, what part of the cistern is filled after 2 hours?

1
7/10
2
9/10
3
17/20
4
19/20
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