railway RRB Technician Grade 3 Mock Test 2024 Quantitative Aptitude Time and Work Work Efficiency

A and B can do a work in 15 days. B and C can do the work in 20 days and A and C can do the work in 10 days. In how many days will they together completed the work?

1
10.67 days
2
10.91 days
3
10.71 days
4
9.23 days
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