A can do a piece of work in 20 days which B alone can do in 12 days B work it at it for 9 days then A and finish the remaining work in
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Step-by-step explanation
A can do a work in =1/20 days
B can do =1/12 days
A+B = 1/20+1/12= 5+3/60=8/60 or 2/15
A+B work 9 days- 2/15×9 = 5/6 day
Left work is 1-5/6= 1/6
A can do 1/20×6= 3/10
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Answer:
answer 3/10
Step-by-step explanation:
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