railway RRB JE (CBT I + CBT II) Mock Test 2024 Quantitative Aptitude Time and Work Work Efficiency

P and Q together can complete some work in 30 days. Q and R together can do the same work in 24 days. R and P together will take 20 days to complete it. If they all work together, in how many days will the job get done?

1
25
2
8
3
15
4
16
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