Asked by Hansa Bokade
A can do work alone in 15 days whereas B can destroy entire work in 20 days. They are working on alternate days with a working on the first day, B working on the second day, then how many days will work completed?
Answers
Answered by
Steve
on any two consecutive days,
1/15 + 1/20 = 7/60 of the job is done
So, after 8 pairs (16) days, 56/60 = 14/15 of the job is done
A finishes the job on day 17.
1/15 + 1/20 = 7/60 of the job is done
So, after 8 pairs (16) days, 56/60 = 14/15 of the job is done
A finishes the job on day 17.
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