10) A machine P can print one lakh books in 8 hours, machine Q can print the
same number of books in 10 hours while machine R can print them in 12
hours. All the machines are started at 9 A.M. while machine P is closed
at 11 A.M. and the remaining two machines complete work. Approximately
at what time will the work (to print one lakh books) be finished ?

- A)11:30 A.M.
- B)12 noon
- C)12:30 P.M.
- D)1:00 P.M.

**Answer: **
D