A company has a job to prepare certain number of cans and there are three machines A, B and C for this job. A can complete the job in 10 days, B can complete the job in 2 days and C can complete the job in 5 days. How many days the company will it take to complete the job if all the machines are used simultaneously?  Answers: A) 4/3 days B) 5/4 days C) 4/5 days D) 20days E) 14 days
Let the total number of cans to be prepared be 10.   The number of cans prepared by A in 1 day = 1.   The number of cans prepared by B in 1 day = 5.   The number of cans prepared by C in 1 day = 2.   Thus, the total number of cans that can be prepared by all the machines working simultaneously in a single day = 8.   Therefore, the number of days taken to complete the whole work = 10/8 = 5/4 days.   ANSWER:5/4 days
<result>B</result>
A company has a job to prepare certain number of cans and there are three machines A, B and C for this job. A can complete the job in 10 days, B can complete the job in 2 days and C can complete the job in 5 days. How many days the company will it take to complete the job if all the machines are used simultaneously?