Lincoln can complete a task in 12 days, Joshua can complete it
in 18 days. Chris can complete the same task in 24 days. Chris
started the task. After 4 days,
Lincoln and Joshua joined. If the task is completed in x more
days, then find the value of x.
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Step-by-step explanation:
Lincoln's one day work = 1/12
Joshua's one day work = 1/18
Chris's one day work = 1/24
therefore Chris's 4 days work = 4*1/24 = 1/6
now working together they complete the work in x - 4 days
1/18 + 1/12 + 1/6 = x - 4
=> (2 + 3 + 6)/36 = x - 4
=> 11/36 = x - 4
=> 11/36 + 4 = x
=> (11 + 144)/36 = x
=> 155/36 = x
=> x = 4.3 days
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