Question

A and B can do a piece of work in 10 hours
and 20 hours, respectively. If they work
together, how long will it take them to finish
the work?​

Answer 1

Answer:

They take 20 hours to complete their work

Answer 2

Answer:15 hours

Step-by-step explanation:we have to add like see if they do together it will take away half work.therefore,do half that is 10/2 and 20/2=5 and 10

now add them=5+ 10=15

here is your answer,

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