Machine A can print one lakh books in 8 hours. Machine B can do the same job in 10 hours. Machine C can do the same job in 12 hours. All the three machines start job at 9.00 am. A breaks down at 11.00 am and the other two machines finish the job. Approximately at what time will the job be finished?	Answers:
A) 12.00 noon
B) 1.30 pm
C) 1.00 pm
D) 11.30 am
E) None of these
Part of print done by A, B and C in 2 hours = 2(1⁄8 + 1⁄10 + 1⁄12) = 37⁄60   Remaining = 1 - 37⁄60 = 23⁄60   If B and C print together, then they can print in 10×12/10+12   Therefore, remaining part can be printed by   B and C in 10×12/22×23/60 ≈ 2 hrs.   Hence, the job will be finished at   9 am + 2 + 2 = 1.00 p.m.   Answer 1.00 pm
<result>C</result>
Machine A can print one lakh books in 8 hours. Machine B can do the same job in 10 hours. Machine C can do the same job in 12 hours. All the three machines start job at 9.00 am. A breaks down at 11.00 am and the other two machines finish the job. Approximately at what time will the job be finished?