A can complete a work in 10 days while B can do it in 15 days.if A and B worked for 3 days and then B left it, find the number of days that A will take to complete the remaining work.
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A can complete a work in. =10 days
B can complete Sam work in =15 days
Therefore A can work in 1 day =1/10
B can work in 1 day=1/15
They work together for 3 days =3A+3B=3/10+3/15=1/2
Rest A work alone =total work done + A 1days work
=1/2 + 1/10=6/10=3/5
Therefore A will take 3 days to complete.
B can complete Sam work in =15 days
Therefore A can work in 1 day =1/10
B can work in 1 day=1/15
They work together for 3 days =3A+3B=3/10+3/15=1/2
Rest A work alone =total work done + A 1days work
=1/2 + 1/10=6/10=3/5
Therefore A will take 3 days to complete.
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