shes
remaining work in 42 days. In how many days could both do it?
1. A and B can together finish a work in 30 days. They
worked at it for 20 days and then B lefts
remaining work was done by A alone in 20 more days. In how many days can A alone do it
Answers
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★ A will do the work in 60 days.
★By Question ,
A & B can together finish a work in 30 days.
So in 1 day 1/30 part of work will be done .
So, in 20 days 20 × 1/30 part of work will be done that is 2/3 .
Now part of work left = 1 - 2/3 = 3-2/3 = 1/3 .
And its given that A completed remaining work in 20 days .And we are required to find in how how many days will A do the whole work . So ;
➳ 1/3 part of work is done by A in 20 days.
➳ Then whole (1) work will be done by A in 20 ÷ 1/3 days = 20 × 3 = 60 days .
Hence the whole work will be done by A in 60 days .
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