Workers

Workers A and B will done work together for 15 days. They worked together 13.5 days. Then A worker became ill and worker B finish the job alone for 7.5 days.

If every worker was working alone, how many days took whole work for worker A and B?

Result

A =  18.8 d
B =  75 d

Solution:

Solution in text A =
Solution in text B =

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