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

A can do a piece of work in 8 days, while B can do it in 7 days. If they work at it alternately beginning with A, then in how many days will the work be completed?

1
8
2
\(8\frac{1}{2}\)
3
\(7\frac{1}{2}\)
4
7
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