Two workers

Two workers will do certain work for 12 days. After 8 days of working, was one removed, and then the other finished the job alone in 10 days.

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

Correct answer:

a =  20 d
b =  30 d

Step-by-step explanation:

12(1a+1b)=1 8(1a+1b)+101b=1  8112+10b=1 b=10/(18/12)=30 d  12(1a+1b)=1 12(1a+130)=1 a=1112130=20 d
b=10/(18/12)=30 d



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