railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Time and Work

A does \(\frac{1}{2}\) of a work in 8 days. He is then assisted by B, and they together finish the remaining work in 4 days. B alone can finish the whole work in:

1
16 days
2
9 days
3
12 days
4
20 days
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