- A20 days
- B40 days
- C25 days
- D30 days
Step-by-Step Solution
A alone: 25 days. In 10 days A does ; B does the other in 10 days, so B alone needs 25 days.
Answer: C) 25 days
A does 20% of a work in 5 days. B then joins and together they finish the rest in 10 days. How long would B take alone?
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