Two workers

Two workers will do certain work for 12 days. After eight days of working, one was removed, and the other finished the job alone in 10 days.

For how many days would you do this work alone for each worker?

Correct answer:

a =  20 d
b =  30 d

Step-by-step explanation:

12(a1+b1)=1 8(a1+b1)+10b1=1  8121+b10=1 b=10/(18/12)=30 d  12(a1+b1)=1 12(a1+301)=1 a=1213011=20 d
b=10/(18/12)=30 d

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