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A can do a piece of work alone in 30 days. B is 25% less efficient than A, while C is $$33{1\over 3}$$ % more efficient than B. In how many days can A, B and C, working together, complete the work?
5Q:
A can do a piece of work alone in 30 days. B is 25% less efficient than A, while C is $$33{1\over 3}$$ % more efficient than B. In how many days can A, B and C, working together, complete the work?
- 1$${150\over 11}$$ daysfalse
- 2$${120\over 11}$$ daystrue
- 3$${140\over 11}$$ daysfalse
- 4$${130\over 11}$$ daysfalse
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