railway RPF SI Mock Test Series 2024 Quantitative Aptitude Time and Work

A and B together can do a piece of work in 12 days, B and C together in 15 days, C and A together in 20 days. If A, B and C work together, then how many days will be required to do the same work?

1
5
2
7
3
7.5
4
10
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