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A and B can do a piece of work in 72 days; B and C can do it in 120 days; A and C can do it in 90 days. In what time can A alone do it ? | |
A. | 80 days [Wrong Answer] |
B. | 100 days [Wrong Answer] |
C. | 120 days [Correct Answer] |
D. | 150 days [Wrong Answer] |