Question

A can complete a work in 30 days. Both A and B can
complete the same work in 20 days. They work
together for 10 days and then A goes away. In how
many days will B finish the work?​

Answer 1

Answer:

your answer is 30..

Step-by-step explanation:

work of A in 1 days = 1/30

work of A and B in 1 days = 1/20

work of B in 1 days = 1/20-1/30

= 1/60

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work of 10 days of A and B = 1/20×10 = 10/20 = 1/2

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now we find remaining work..

1 - 1/2 = 1/2

______________________

Now,

B do 1/60 works in = 1 days

B do 1 work in = 60 days

B do 1/2 work in = 60×1/2

= 30 days..

______________________

B do 1 work in 60 days

B do half work in 30 days...

Answer 2

Step-by-step explanation:

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