- A24
- B12
- C18
- D36
Step-by-Step Solution
Rates are A::1, so combined 3 units/day; total work = units; A alone at 2 units/day takes 36/2 = 18 days.
Answer: C) 18
A is twice as efficient as B. Working together, A and B can complete a piece of work in 12 days. In how many days can A alone complete the work?
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