A can do a piece of work in 80 days and B in 100 days. They work together for 20 days and then B gone away. In how many days will A finish the remaining work?
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Answer:44 days
Step-by-step explanation:
In one day A does the work of 1/80
And B 1/100
If they work for 20days then total work done is
20/80+20/100=1/4+1/5
=9/20
Remaining work=1-9/20=
=11/20
In one day A does 1/80
So time required to do the 11/20 work is 11/20/(1/80)=11/20*80=11*4
=44
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