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.


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