Question

One construction company can do certain job in ten days and a second construction company can do the same job in fifteen days. How many will it take to complete the job if the two construction companies work together? ​

Answer 1

Step-by-step explanation: it will take them 5 days to complete the job

Answer 2

technically it should take 12 and a half days

Explanation:

that is what is in-between the two amounts of days so it's the average if they bothe worked together but in my opinion in reality I think if they worked together it would take less than 10 days