alleryA does a job in 16 days, B in 8 days. A works 4 days alone, then B joins. Total time from start is
A7 days
B6 days
C9 days
D8 days
Answer & Solution
Correct answer: D. 8 days
A does 1/4 alone; the remaining 3/4 at 3/16 per day takes 4 days, so 8 days in all.
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