- A1/4
- B1/3
- C2/3
- D1/2
Step-by-Step Solution
Combined rate = 1/20 + 1/30 = 1/12 per day; in 6 days they do 6/12 = 1/2, so 1/2 is left.
Answer: D) 1/2
A can do a piece of work in 20 days and B in 30 days. They work together for 6 days. What fraction of the work is left?
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