- A11
- B13
- C12
- D12.5
Step-by-Step Solution
Take total work as 30 units; A does 2 units/day, B does 3 units/day, so each 2-day pair adds 5 units. Six pairs (12 days) give exactly 30 units.
Answer: C) 12
A can do a work in 15 days and B in 10 days. They work on alternate days, with A starting on the first day. In how many days will the work be completed?
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