- A5
- B4
- C7
- D6
Step-by-Step Solution
Together = 1/10 + 1/15 = 1/6 per day; in 4 days = 4/6 = 2/3 done. Remaining 1/3 ÷ (1/15) = 5 days.
Answer: A) 5
A can do a work in 10 days and B in 15 days. They work together for 4 days, then A leaves. In how many more days will B alone finish the remaining work?
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