a crew of highway workers paved 2 over 15 mile in 20 minutes. if they work at the same rate,What portion of a mile will they pave in one hour?
Accepted Solution
A:
[tex]20 \ mins \ = \dfrac{2}{15} \ mile[/tex]
---------------------------------------------------------------- Find 10 mins : ---------------------------------------------------------------- [tex]10 \ mins \ = \dfrac{2}{15} \div 2 \ mile[/tex]
[tex]10 \ mins \ = \dfrac{2}{15} \times \dfrac{1}{2} \ mile[/tex]
[tex]10 \ mins \ = \dfrac{1}{15} \ mile[/tex]
---------------------------------------------------------------- Find 60 mins (60 mins = 1 hour) : ---------------------------------------------------------------- [tex]60 \ mins \ = \dfrac{1}{15} \times 6 \ mile[/tex]
[tex]60 \ mins \ = \dfrac{6}{15} \ mile[/tex]
[tex]60 \ mins \ = \dfrac{2}{5} \ miles[/tex]
---------------------------------------------------------------- Answer: They can pave 2/5 miles in 1 hour. ----------------------------------------------------------------