One road crew can pave a section of highway in 15 h. a second crew can do the same job in 10h. how long would it take to pave that same section of highway if both crews worked together?

Question

Mathematics

Olive Webb

8 March, 08:03

One road crew can pave a section of highway in 15 h. a second crew can do the same job in 10h. how long would it take to pave that same section of highway if both crews worked together?

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Answers (1)

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Gardner · Answer 1

For this case what you can do is an average to calculate the number of hours it will take them to work together:

Let

t: average time.

hi: hours worked for each one.

n: number of teams.

The average will be given by:

t = (h1 + h2) / (n)

Substituting both values:

t = ((15) + (10)) / (2) = 12.5

answer

it would take 12.5 h to pave that same section of highway if both crews worked together