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1. |
In a press there are three types of printing machines A, B, and C. Machine A can print ten thousand pages in 8 hours, machine B can do the same task in 10 hours, and machine C can do the same task in 12 hours. All three machines start the task at 9∶00 a.m. Machine A breaks down at 11∶00 a.m. and machines B and C continue working. At 12∶00 noon machine B also breaks down and machine C alone has to complete the remaining task. What is the approximate time of completion of the task? |
A. | 1∶54 p.m. |
B. | 2∶24 p.m. |
C. | 12∶45 p.m. |
D. | 2∶40 p.m. |
Answer» C. 12∶45 p.m. | |