Question
A, B, and C, working alone, can complete a job in 16,
24, and 36 days, respectively. In how many days can they complete the job if they work together?Solution
Using the LCM method, The LCM of 16, 24 and 36 = 144(total work) A's efficiency = 144/16=9 B's efficiency = 144/24=6 C's efficiency = 144/36=4 Time = Total work / Total efficiency Time =144/ (9+6+4) Time =144/19 Time =7(11/19) days.
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