- A7/12
- B1/2
- C5/12
- D2/3
Step-by-Step Solution
Combined rate = 1/20 + 1/30 = 1/12 per day; in 5 days they do 5/12, so 1 − 5/12 = 7/12 is left.
Answer: A) 7/12
A can do a work in 20 days and B in 30 days. They work together for 5 days and then stop. What fraction of the work is left?
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