Question

A and B together can do a piece of work in 10 days. If A alone will take 12 days to finish the work. How long will B take to finish the work?​

Answer 1

Answer:

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In 10 days A + B can so = 1 work

In 1 day A+B can do = 1/10 work

In 15 days A can do = 1 work

In 1 day A can do = 1/15 work

Let in x days B can do = 1 work

so in 1day B can do 1/x work

In 1 day A+B can do = 1/10 work

1/15 + 1/x = 1/10

1/x = 1/10 - 1/15

1/x = 1/30

x = 30

Hence B can finish the work in 30 days