Question :
A is 50% as efficient as B. C does half of the work done by A and B together. If C alone does the work in 40 days, then A, B and C together can do the work in
1. 15 1/3 days
2. 13 1/3 days
3. 14 1/3 days
4. 12 1/3 days
Answer :
2 - 13 1/3 days
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