railway DMRC CRA Mock Test Series Quantitative Aptitude Time and Work Work Efficiency

A, B and C completes a work in 16, 4 and 8 days respectively. Find the time taken (in days) by them to complete the work if they work together.

1
1
2
2
3
\(2{2\over 7}\)
4
\(3{2\over 7}\)
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