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

A can do 1 / 5 of a job in 10 days, B can do 1 / 3 rd of the job in 25 days. In how many days can they do half of the job working together?

1

30

2

45

3

15

4

20

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