A can do a piece of work in 30 days and B can do it in 20 days. they work together for 4 days and then B leaves the job . In how many days , Will A finish the remaining work
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Answer:
20 days
Step-by-step explanation:
work done by A in 1 day= 1/30
work done by B in 1 day= 1/20
work done by A and B in 1 day= 1/30+1/20=1/12
work done by then in 4 days= 1/3
friction of work left= 1-1/3=2/3
days needed by A to do the remaining work=2/3÷1/30=2/3×30=20
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