# Two companies

The family ordered two companies to modify the garden. The first would be done in 20 days, the second would take 40% less time. How long will they work together if the second company started working when the first worked for 4 days?

Result

t =  6 d

#### Solution:

$\ \\ 4/20 + t \cdot \ (1/20 + 1/(20-40/100 \cdot \ 20)) = 1 \ \\ \ \\ 13.333333t = 80 \ \\ \ \\ t = 6 \ \\ = 6 \ \text { d }$ Our examples were largely sent or created by pupils and students themselves. Therefore, we would be pleased if you could send us any errors you found, spelling mistakes, or rephasing the example. Thank you!

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