Three workers

Three workers, A, B, and C, have to work on a specific task. Workers A and B completed the task in 12 days, B with C for 19 days, and A with C for 24 days.

How long would it take to complete the task for everyone alone?
How long would it take to complete the task if all three worked together?

Correct answer:

A =  27.64 d
B =  21.21 d
C =  182.4 d
x =  11.2593 d

Step-by-step explanation:

A1+B1=121 B1+C1=191 A1+C1=241  a=27.64 d
b=21.21 d
c=182.4 d
t1=A1+B1+C1 t=A1+B1+C11 t=11.2593 d

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