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1. |
A man can do a piece of work in 5 days, but with the help pf his son, he can do it in 3 days. In what time can the son do it alone? |
A. | 7 days |
B. | 6x1/2 days |
C. | 8 days |
D. | 7x1/2 days |
Answer» E. | |